Wikipedia

Doom (franchise)

(Redirected from Doom (game))
"Doom (video game)" redirects here. For the 1993 game, see Doom (1993 video game). For the 2016 game, see Doom (2016 video game).

Doom (stylized as DOOM) is an American media franchise created by John Carmack, John Romero, Adrian Carmack, Kevin Cloud, and Tom Hall.[1] The series usually focuses on the exploits of an unnamed space marine (often referred to as Doomguy or Doom Slayer) operating under the auspices of the Union Aerospace Corporation (UAC), who fights hordes of demons and the undead to save Earth from an apocalyptic invasion.

Doom
Created by
Original workDoom (1993)
Ownerid Software
Years1993–present
Print publications
Novel(s)Novel series
ComicsDoom (1996)
Films and television
Film(s)Doom (2005)
Direct-to-videoDoom: Annihilation (2019)
Games
TraditionalDoom: The Boardgame (2004)
Video game(s)List of video games

The original Doom is considered one of the first pioneering first-person shooter games, introducing to IBM-compatible computers features such as 3D graphics, third-dimension spatiality, networked multiplayer gameplay, and support for player-created modifications with the Doom WAD format. Over ten million copies of games in the Doom series have been sold; the series has spawned numerous sequels, novels, comic books, board games, and film adaptations.

Overview

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The Doom video games consist of first-person shooters in which the player controls an unnamed space marine commonly referred to as Doomguy; in the 2016 series, the protagonist is called the "Doom Slayer" or just "Slayer" in later entries. The player battles the forces of Hell, consisting of demons and the undead. The games are usually set within sprawling bases on Mars or its moons, while some parts occur in Hell. The classic series had only a minimal focus on the narrative, much of which was in the manuals rather than the games.[2] More recent titles, notably the 2016 series, would feature a heavier focus on narrative.[3]

The original game featured eight weapons, designed so that no weapon became obsolete after the acquisition of another. With the player carrying all these weapons at once, the strategy of "gun juggling"—rapidly switching between the weapons depending on circumstance—can be employed.[4] Outside of combat mechanics, Doom levels often feature mazes, colored key cards and hidden areas.[5][6] As the genre was in its infancy in the early 1990s, the player could not jump or look up and down in the classic series due to technical limitations. Some limited platforming was however present, as players could sprint at gaps and let their momentum carry them to a destination.[7] These features were added in newer titles,[8] with the 2016 series in particular featuring a strong focus on platforming.[9]

Development and history

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Release timeline
Main series in bold
1993Doom
1994Doom II: Hell on Earth
1995Master Levels for Doom II
The Ultimate Doom
1996Final Doom
1997Doom 64
1998
1999
2000
2001
2002
2003
2004Doom 3
2005Doom 3: Resurrection of Evil
Doom RPG
2006
2007
2008
2009Doom Resurrection
Doom II RPG
2010Doom II: No Rest for the Living
2011
2012Doom 3: BFG Edition
2013
2014
2015
2016Doom
2017Doom VFR
2018
2019Sigil
2020Doom Eternal
Doom 64: The Lost Levels
The Ancient Gods, Part One
2021The Ancient Gods, Part Two
Doom 3: VR Edition
2022
2023Mighty Doom
Sigil 2
2024Doom + Doom II
Doom II: Legacy of Rust
2025Doom: The Dark Ages

Classic series (1992–1997)

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See also: Development of Doom

The development of the original Doom started in 1992, when John Carmack developed a new game engine, the Doom engine, while the rest of the id Software team finished the Wolfenstein 3D prequel, Spear of Destiny. The game launched in an episodic format in 1993, with the first episode available as shareware and two more episodes available by mail order. The first episode was largely designed by John Romero.[10] The title proved extremely popular, with the full version of the game selling one million copies. The term "Doom clone" became the name for new genre now known as first-person shooters for several years.[11]

Doom II: Hell on Earth was released in 1994 in a commercial format. Only minor changes were made at a technical level; the game featured new enemies, a new "Super Shotgun" weapon, and more complex levels.[12] The game was followed by an expansion in 1995, titled Master Levels for Doom II, which added 20 additional levels. A fourth episode was added to the original game by the 1995 re-release.[13]

From 1995 id Software were focused on the development of the new Quake series, which would be developed by the company throughout the late 1990s.[14] Two additional games would be released over the following years, largely created by third-party developers under id's supervision. The first of these was Final Doom, which featured 64 levels based on the Doom II engine, organised into two episodes. TNT: Evilution was developed by the modding group TeamTNT and completed in November 1995, while the second episode The Plutonia Experiment was developed by TNT's Dario and Milo Casali and completed in January 1996.[citation needed]

Midway Games developed Doom 64 under id supervision for release in 1997. The title featured a new engine, with larger sprites and higher quality textures. The technical changes allowed for greater flexibility with the level design, such as the ability to adjust the geometry of the map during play. The classic metal soundtrack was replaced for a more ambient and eerie soundtrack, creating a unique atmosphere that would inspire future entries. Id did not allow the title to be called Doom 3, as the name was being reserved for a potential return to the franchise after the development of Quake.[15][16]

Doom 3 and cancelled fourth game (2000–2013)

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Main article: Doom 3 § Production

The troubled development of Quake had resulted in major staffing changes at id by 2000, with a number of key figures from the development of Doom having departed. This included the original designer John Romero, who was fired in 1996.[10] In the interim, the company had hired former Doom modder Tim Willits.[14] By 2000 a new non-Doom game was being designed, but id staff had a "lack of enthusiasm" for the project, and strongly desired to remake the original Doom instead. John Carmack, among others, announced internally that they were working on a Doom game- and would continue to do so unless the company fired them. While Paul Steed was indeed fired, work on the game did continue.[17]

The title was unveiled later that year as Doom 3. The design of the title would be led by Willits.[18] Using the new id Tech 4 engine, numerous technical improvements were made over the classic series, allowing greater realism and interactivity. The game used voice acting and featured a greater focus on narrative than earlier titles. A demo of the game was shown at E3 2002 and was subsequently leaked online, well ahead of the 2004 release date. At the time, it was the first Doom title in seven years, and helped renew interest in the franchise.[19] An expansion, Doom 3: Resurrection of Evil was released in 2005. Unlike the base game, the expansion was developed by Nerve Software. A 2012 BFG Edition featured both previous releases along with a new expansion entitled The Lost Mission. A version of Doom 3: BFG Edition called Doom 3: VR Edition was released on March 29, 2021 for the PlayStation 4 VR and PlayStation 5 via backwards compatibility. It includes all of the content from Doom 3: BFG Edition (the main campaign, Resurrection of Evil and The Lost Mission), except for multiplayer.

Doom 4 entered development in the mid 2000s alongside Rage, with the new Doom title initially planned as a rework of Doom II. Hints were present in 2007 at QuakeCon, and the game was formally announced in 2008. Response to preview material was negative, with fans nicknaming the project "Call of Doom", after a perceived similarity to the Call of Duty franchise. Bethesda marketing vice president Pete Hines stated in retrospect that "it wasn't Doom enough". After Rage was not as successful as hoped, publisher ZeniMax requested a reboot of Doom 4 and moved the Rage staff over to the new project. This version was built using Rage's code base and suffered from disputes among staff, particularly among managers of the two projects.[20] The game was cancelled in 2013. John Carmack, one of the few remaining veterans from the development of the classic series still present at id, left the studio that November.[21]

The period saw the release of several spinoffs for mobile platforms. These included Doom RPG (2005), Doom II RPG (2009), and Doom Resurrection (2009). Additionally, the 2010 Xbox Live Arcade re-release of Doom II featured a new expansion entitled No Rest for the Living, which was developed by Nerve Software. This was structured in a similar manner to classic Doom chapters, with eight primary levels and one secret level. This release was packaged with the BFG Edition of Doom 3 in 2012.[22][23]

Revival series (2013–present)

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After the 2013 scrapping of the Doom 4 project, Willits stated that the next game in the Doom series was still the team's focus.[24] Hugo Martin was hired as creative director that year and would go on to be a key figure in the revived franchise.[25] The game was announced simply as Doom in 2014. It was released to generally positive reception in 2016, with a glory kill mechanic and additional platforming manoeuvres among the main gameplay additions.[26] The game's multiplayer mode received three small downloadable content releases over the course of the first year, and all three were then released for free with the 6.66 update on July 19, 2017.[27]

The 2016 series was not originally described as a continuation or origin story of earlier games, however plot details in the sequel Doom Eternal and commentary from Martin would later describe it as a continuation of the classic series.[28][29] The 2020 re-release of Doom 64 included an expansion entitled The Lost Levels, intended "to connect 'old' Doom to 'new' Doom".[30]

A VR spinoff entitled Doom VFR was released in 2017 to generally positive reception, with reviewers discussing the movement controls in particular- which were well made albeit hidden behind menus.[clarification needed] The game features a single-player campaign, and reused enemies and other assets from the 2016 game.[31] The game would be the last Doom title under Willits' leadership, ahead of his departure in 2019.[32] 2018 marked the 25th anniversary of the franchise, and saw the Doom Slayer included as a playable character in id Software's Quake Champions. That year, John Romero announced Sigil, an unofficial "fifth episode" of the original 1993 game. The episode was released for free via Romero's website in 2019, with a paid version available that included a soundtrack by guitarist Buckethead.[33] While Sigil was developed independently, Bethesda added the episode to the console ports of Doom as a free patch in October, alongside the two chapters of Final Doom.[34][35]

The next main entry in the franchise, Doom Eternal, was directed by Hugo Martin and released in 2020.[36][37] The title sold very well, generating $450 million in revenue over the first year; double the launch revenue of the previous title. Some commentators cited the timing of the release, which coincided with a wave of interest in gaming worldwide amid restrictions on social gathering during the COVID-19 pandemic.[38][39] The game was made in id Tech 7, which afforded numerous technical improvements over the id Tech 6 engine used by its predecessor.[40] An expansion of the game, The Ancient Gods, was released in two parts, one in October 2020 and the other in March 2021.

Romero confirmed in August 2021 that a second Sigil expansion using the Doom II engine was in development.[41] In March 2022, he released a new Doom II level entitled One Humanity. The proceeds from the level were donated as humanitarian aid for Ukraine amid the Russian invasion.[42] The level was the first for Doom II designed by Romero since 1994, and raised 25,000 euros by March 7.[43] Romero released Sigil II in 2023 and was critically acclaimed.[44] Like its predecessor, Id Software made the chapter freely available through the add-ons menu of the console ports of Doom and Doom II.[45] A spin-off for mobile platforms Android and iOS, Mighty Doom, was developed by Alpha Dog Games and released in March 2023.[46] Microsoft announced that it was shutting down Alpha Dog in May 2024; this resulted in the discontinuation of Mighty Doom in August.[47]

In August 2024, id Software in collaboration with Nightdive Studios and MachineGames released Doom + Doom II, a "definitive rerelease" of all the pre-Doom 64 games alongside Sigil and a new 2 episode expansion pack called Legacy of Rust. The release features new enemies and weapons.[48]

Future

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In March 2021, Hugo Martin discussed some directions future Doom titles could take, discussing time travel or a game set in the time span between Doom 64 and Doom (2016), when the Doom Slayer "first came to that place with the Sentinels, almost like a more medieval setting".[49][29] An internal ZeniMax presentation, dated to 2020 and released as part of the FTC v. Microsoft case in 2023, indicated that a game entitled Doom: Year Zero was in development at that time, with a projected release in FY2023. DLC for the title was also marked for 2023 and 2024. The document was produced prior to Microsoft's acquisition of ZeniMax in 2021, but the game remained in production and was revealed at the 2024 Xbox Games Showcase as Doom: The Dark Ages. The game will launch in 2025.[50][51]

Games

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Main series

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Title Details
Doom

Original release date:
  • NA: December 10, 1993
  • EU: December 1993
 Release years by system:
Notes:
  • Originally developed by id Software and published by GT Interactive.
  • On April 30, 1995, an updated version of the game, The Ultimate Doom, was released; it included a new fourth episode, "Thy Flesh Consumed", in addition to the original three episodes.
  • On December 23, 1997, John Carmack released the source code of Doom for Linux under a proprietary Doom Source License.
  • On October 3, 1999, John Carmack relicensed the source code of Doom for Linux to GNU GPL-2.0-or-later. Since then the list of Doom ports has grown from game consoles and operating systems that never saw an official release (including some pre-Android and pre-iOS early smart phones), to unusual devices such as oscilloscopes and other embedded systems.
  • On November 3, 2009, John Carmack released the source code of Doom on iOS[52] under GNU GPL-2.0-or-later. It does not run on modern iPhones, but can be emulated and run on PCs and Android phones with touchHLE emulator.[53][54]
  • On May 22, 2019, John Romero released an unofficial 5th episode titled "Sigil" to commemorate the game's 25th anniversary.
  • On July 14, 2020, Randal Linden released the source code of Doom on SNES under GNU GPL-3.0-or-later.[55]
  • On December 10, 2023, John Romero released an unofficial 6th episode titled "Sigil II" to commemorate the game's 30th anniversary.
Doom II: Hell on Earth

Original release date:
  • WW: October 10, 1994
 Release years by system:
  • 1994 – MS-DOS
  • 1995 – Mac OS
  • 2002 – Game Boy Advance
  • 2010 – Xbox 360 (original Activision release)
  • 2012 – Xbox 360 (Bethesda re-release)
  • 2019 – Nintendo Switch, PlayStation 4, Xbox One, iOS, Android
Notes:
  • Originally developed by id Software and published by GT Interactive.
  • On December 26, 1995, an expansion pack, Master Levels for Doom II, was released; it included 21 additional levels.
  • On May 26, 2010, an expansion pack, Doom II: No Rest for the Living, was released for the Xbox 360 release of the game, developed by Nerve Software.
Final Doom

Original release date:
  • NA: June 17, 1996
  • EU: 1996
 Release years by system:
Notes:
  • Developed by TeamTNT and published originally by id Software.
  • Final Doom is a compilation of two standalone Doom II modifications, TNT: Evilution and The Plutonia Experiment, which include full sets of new levels (both of them use the same level structure as Doom II with 30 regular levels and two secret levels), new graphics and textures, new music (for TNT: Evilution), and new text interlude screens in addition to most of the resources from Doom II and some from Doom.
Doom 64

Original release dates:
  • NA: April 4, 1997
  • PAL: December 2, 1997
 Release years by system:
  • 1997 – Nintendo 64
  • 2020 – Microsoft Windows, Nintendo Switch, PlayStation 4, Stadia, Xbox One (Bethesda re-release)
Notes:
  • Originally developed and published by Midway Games.
  • The 2020 port is higher-resolution than the original, and includes a new multi-level sequel chapter.[57]
Doom 3

Original release dates:
  • NA: August 3, 2004
  • EU: August 13, 2004
 Release years by system:
Notes:
  • Originally developed by id Software and published by Activision.
  • The Xbox version contains the full versions of The Ultimate Doom and Doom II, but they are only available in the limited collector's edition.
  • On November 22, 2011, id Software released the source code under GNU GPL-3.0-or-later.
Doom 3: Resurrection of Evil

Original release dates:
  • NA: April 3, 2005
  • EU: April 8, 2005
 Release years by system:
2005 – Microsoft Windows, Linux, Xbox
Notes:
  • Developed by Nerve Software and published by Activision.
  • Expansion pack for Doom 3, which requires Doom 3 to play on Microsoft Windows.
  • The Xbox version does not require Doom 3 to play and also contains the full versions of The Ultimate Doom, Doom II, and Master Levels for Doom II.
Doom 3: BFG Edition

Original release dates:
  • NA: October 16, 2012
  • AU: October 18, 2012
  • EU: October 19, 2012
 Release years by system:
Notes:
  • Originally developed by id Software and published by Bethesda Softworks.
  • HD remasters of Doom 3 and its expansion Resurrection of Evil. A new expansion pack is also included in the game titled The Lost Mission.
  • The game also includes the full versions of The Ultimate Doom and Doom II, including the No Rest for the Living expansion pack by Nerve Software.
  • On November 26, 2012, id Software released the source code under GNU GPL-3.0-or-later.
Doom

Original release date:
  • WW: May 13, 2016
 Release years by system:
  • 2016 – Microsoft Windows, PlayStation 4, Xbox One
  • 2017 – Nintendo Switch
  • 2020 – Stadia
Notes:
  • Developed by id Software and published by Bethesda Softworks.
  • Multiplayer co-developed with Certain Affinity.
  • SnapMap co-developed with Escalation Studios.
Doom Eternal

Original release date:
  • WW: March 20, 2020
 Release years by system:
Notes:
  • Developed by id Software and published by Bethesda Softworks.
  • Sequel to the 2016 reboot.
Doom 3: VR Edition

Original release date:
  • WW: March 29, 2021
 Release years by system:
  • 2021 – PlayStation 4 VR
Notes:
  • Originally developed by id Software and published by Bethesda Softworks.
  • HD remasters of Doom 3: BFG Edition.
  • Also playable on PlayStation 5 with backwards-compatibility.
Doom: The Dark Ages

Original release date:
  • WW: 2025
 Release years by system:
  • 2025 – Microsoft Windows, Xbox Series X/S, PlayStation 5
Notes:

Prequel to Doom 2016.

Spin-offs

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Title Details
Doom RPG

Original release date:
  • WW: September 13, 2005
 Release years by system:
2005 – mobile
Notes:
Doom II RPG

Original release date:
  • WW: September 13, 2005
 Release years by system:
2009 – mobile
Notes:
  • The sequel to Doom RPG, developed and published by id Software.
Doom Resurrection

Original release date:
  • WW: June 26, 2009
 Release years by system:
2009 – iOS
Notes:
  • Developed by Escalation Studios and published by id Software.
  • Set in parallel to Doom 3.
Doom II RPG

Original release date:
  • WW: November 23, 2009
 Release years by system:
Notes:
  • Developed and published by id Software.
Doom VFR

Original release date:
  • WW: December 1, 2017
 Release years by system:
2017 – Windows Mixed Reality, HTC Vive, PS VR
Notes:
  • Developed by id Software and published by Bethesda Softworks.
  • Virtual-reality game, set during the events of Doom (2016).
Mighty Doom

Original release date:
  • WW: March 21, 2023
 Release years by system:
2023 – mobile
Notes:
  • Top-down shooter developed by Alpha Dog Games featuring a mini version of Doom Slayer. Shut down on August 7, 2024.

Other media

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Novels

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A set of four novels based on Doom were written by Dafydd ab Hugh and Brad Linaweaver, and were published between June 1995 and January 1996 by Pocket Books. The books, listed in order, are titled Knee Deep in the Dead, Hell on Earth, Infernal Sky and Endgame. The unnamed Marine is called "Flynn Taggart" or "Fly" in the novels. The first two books feature recognizable locations and situations from the first two games. A film novelization was released by Pocket Star Books in 2005. It was adapted by John Shirley.

In 2008, a new series of Doom novels by Matthew J. Costello, an author who had worked on the story and scripts for Doom 3 and Resurrection of Evil, were published. The series of books aim to novelize the story of Doom 3, with the first installment, Doom 3: Worlds on Fire, published on February 26, 2008.[58] The second book in the series, Doom 3: Maelstrom, was released in March 2009.[59]

Richart Cobbett of PC Gamer called the first installment of the Doom novels "the only one genuinely worth bothering with for the laughs", describing the other novels as largely unrelated sci-fi stories.[60]

Comic book

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A one-shot comic book written by Steve Behling and Michael Stewart with art by Tom Grindberg was released in May 1996 by Marvel Comics as a giveaway for a video game convention[citation needed] and has gained a cult following for its over-the-top dialogue. Phrases such as "rip and tear" and "huge guts" have since been referenced by later Doom titles.

Tabletop games

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In 2004, a board game designed by Kevin Wilson and published by Fantasy Flight Games titled Doom: The Boardgame was released.[61]

In 2020, Critical Role published a fifth edition Dungeons & Dragons module entitled Doom Eternal: Assault on Amaros Station. The game was written by Christopher Lockey and Matthew Mercer, and received a digital release via the Critical Role store on December 16, 2020.[62][63][64]

Films

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Doom (2005)

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Main article: Doom (film)

In 2005, Universal Pictures released the first live-action film adaptation, titled Doom, which starred Karl Urban and Dwayne Johnson.

Doom: Annihilation (2019)

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Main article: Doom: Annihilation

In 2019, Universal released a second live-action film adaptation direct-to-video, titled Doom: Annihilation starring Amy Manson.

Reception

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Aggregate review scores
As of January 21, 2021.
Game GameRankings Metacritic
Doom (1993) (PC) 86.67%[65]
(PS1) 84.00%[66]
(iOS) 82.86%[67]
(X360) 80.16%[68]
(32X) 80.00%[69]
(GBA) 79.87%[70]
(JAG) 78.75%[71]
(SNES) 54.05%[72]
(SAT) 47.00%[73] 		(iOS) 84[74]
(X360) 82[75]
(GBA) 81[76]
Doom II: Hell on Earth (PC) 95.00%[77]
(X360) 77.36%[78]
(GBA) 76.64%[79] 		(PC) 83[80]
(X360) 77[81]
(GBA) 77[82]
Final Doom (PS1) 80.71%[83]
(MAC) 60.00%[84]
(PC) 56.00%[85]
Doom 64 (N64) 73.47%[86] (XONE) 77[87]
(PS4) 75[88]
(Switch) 77[89]
Doom 3 (Xbox) 87.63%[90]
(PC) 86.63%[91] 		(Xbox) 88[92]
(PC) 87[93]
Doom 3: Resurrection of Evil (PC) 79.52%[94]
(Xbox) 78.02%[95] 		(PC) 78[96]
(Xbox) 77[97]
Doom RPG (MOBI) 87.45%[98] —
Doom Resurrection (iOS) 86.43%[99] (iOS) 79[100]
Doom II RPG (MOBI) 80.00%[101]
(iOS) 79.00%[102] 		(iOS) 80[103]
Doom 3: BFG Edition (PS3) 68.00%[104]
(X360) 66.63%[105]
(PC) 51.67%[106] 		(PS3) 67[107]
(X360) 67[108]
(PC) 59[109]
Doom (2016) (XONE) 89.04%[110]
(PS4) 85.82%[111]
(PC) 85.38%[112] 		(XONE) 87[113]
(PS4) 85[114]
(PC) 85[115]
(Switch) 79[116]
Doom Eternal (XONE) 88[117]
(PS4) 87[118]
(PC) 88[119]
(Switch) 81[120]
Doom 3: BFG Edition (PS4) 67[121]

In 1996, Next Generation ranked the series as the 19th top game of all time, for how "despite the hundreds of copycat titles, no one has ever been able to equal id's original, pulsing classic."[122] In 1999, Next Generation listed the Doom series as number 25 on their "Top 50 Games of All Time," commenting that, "despite the graphic advances since Doom was released, the pixilated Barons of Hell and Cyber Demons still rank as some of the scariest things that can grace your screen."[123]

The series' unnamed protagonist, a marine, has had a mostly positive reception. In 2009, GameDaily included "the Marine" on its list of "ten game heroes who fail at the simple stuff" for his inability to look up and down in the original series.[124] UGO Networks ranked him fourth on its 2012 list of best silent protagonists in video games, noting his courage to continue in silence even when he faces Hell's army.[125] In 2013, Complex ranked Doomguy at number 16 on its list of the greatest soldiers in video games for being "the original video game space marine" and "one of the classic silent protagonists."[126] Both CraveOnline and VGRC ranked him the fifth most "badass" male character in the video game's history.[127][128]

Sales

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The original Doom sold 3.5 million physical copies[129] and 1.15 million shareware copies[130] from its 1993 release up through 1999. Doom II sold 1.55 million copies of all types in the United States during the same period,[130] with about a quarter of that number also sold in Europe,[131] a total of some 5-6 million sales for the original duology. Doom 3 sold 3.5 million copies along with many copies of the expansion pack Resurrection of Evil from its 2004 release up through 2007, making it the most successful game in the series at that point.[132] The sales of Doom 64 were not disclosed.

The 2016 reboot sold over 2 million copies on the PC alone from its May 2016 release up to July 2017.[133]

References

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  1. ^ McCaffrey, Ryan (December 10, 2013). "We Play Doom with John Romero". IGN. Ziff Davis. Archived from the original on January 11, 2018. Retrieved February 2, 2018.
  2. ^ "DOOMTEXT.HTM: Storylines for Doom, Doom II, Final Doom, Doom 64". Retrieved June 25, 2011.
  3. ^ Kuchera, Ben (March 17, 2021). "Where does Doom go next?". Polygon.
  4. ^ Lane, Rick (April 29, 2021). "Doom Eternal has ruined all other shooters for me". PC Gamer.
  5. ^ Evans-Thirlwell, Edwin (November 12, 2019). "Doom creator John Romero on what's wrong with modern shooter games". The Guardian.
  6. ^ Gomez, Gregory Louis (June 28, 2021). "10 Classic FPS Tropes That Aren't Around Anymore". Game Rant.
  7. ^ "Doom II (Classic) Review - Hell on Earth". August 28, 2019.
  8. ^ Dunsmore, Kevin (March 19, 2020). "Doom 64 is a Lost Gem, Nostalgic Counterpart to Eternal – Hardcore Gamer". HardcoreGamer.
  9. ^ "Why Doom Eternal Incorporates Puzzle Platforming". GameSpot.
  10. ^ a b Jensen, K. Thor (May 25, 2020). "20 Years Ago, John Romero's Daikatana Nearly Destroyed Doom's Legacy". PCMag UK.
  11. ^ "A Brief History of Doom". Prima Games. June 15, 2015.
  12. ^ "DOOM II: Hell on Earth". ClassicReload.com. February 22, 2014.
  13. ^ Wales, Matt (August 16, 2021). "John Romero's unofficial Doom episode Sigil is getting a sequel for Doom 2". Eurogamer.
  14. ^ a b Yang, Robert (August 19, 2021). "Quake Renaissance: where is Quake now, and how did it get here?". Rock, Paper, Shotgun.
  15. ^ "Doom 64 News". IGN. November 11, 1996. Retrieved July 8, 2013.
  16. ^ Craddock, David (April 3, 2020). "Terraform: The Making of Doom 64". Shacknews.
  17. ^ "Video Game News, Reviews, and Walkthroughs – IGN". Archived from the original on May 6, 2006.
  18. ^ Carmack, John (June 1, 2000). "1 June 2000 .plan document for Doom 3 ". GameFinger. Archived from the original on May 6, 2006. Retrieved September 3, 2006.
  19. ^ Livingston, Christopher (October 16, 2015). "The biggest leaks in PC gaming". PC Gamer.
  20. ^ Schreier, Jason (April 3, 2013). "Five Years and Nothing to Show: How Doom 4 Got off Track". Kotaku.
  21. ^ Peel, Jeremy (September 12, 2017). "How the loss of John Carmack was the making of Doom". PCGamesN.
  22. ^ Chalk, Andy (June 24, 2015). "Bethesda's original Doom 4 was canned for being "Call of Doom"". PC Gamer.
  23. ^ Garvey, Marshall (December 30, 2020). "What DOOM 4's Cancelled Game Would Have Looked Like". Screen Rant.
  24. ^ "id Software and Bethesda's Cancelled 'Doom 4' Just Wasn't 'Doom' Enough". MTV. August 5, 2013. Archived from the original on November 4, 2013. Retrieved November 29, 2013.
  25. ^ Sinclair, Brendan (September 17, 2019). "Where do you go from Doom?". GamesIndustry.biz.
  26. ^ Gilroy, Joab (May 16, 2016). "Doom Review". IGN.
  27. ^ Matulef, Jeffrey (July 19, 2017). "Doom's paid DLC is now free for everyone". Eurogamer.
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