This article relates to the game "Half-Life 2". Click here for more information.
This article's documentation is for anything that uses the Source engine. Click here for more information.

Half-Life 2: Episode One: Difference between revisions

From Valve Developer Community
Jump to navigation Jump to search
(Metascore is no longer 89... it's 88)
mNo edit summary
 
(101 intermediate revisions by 28 users not shown)
Line 1: Line 1:
{{game release|appid=380}}
{{LanguageBar}}
{{trailer release|appid=905|mb=27.2|trailer=Half-Life 2: Episode One Trailer}}
{{hl2 topicon}}{{src topicon}}
{{metacritic score green|gameid=halflife2episodeone|score=88}}


{{hl2}} Previously called Aftermath, '''Episode One''' is a continuation of [[Half-Life 2]] focusing on developing [[Alyx Vance|Alyx]] as a character. It is known to feature [[HDR]] lighting and improved AI for [[npc_alyx|Alyx]] and the [[npc_citizen|citizens]]. See links for more details.
{{Game Infobox
|title = Half-Life 2: Episode One
|image = Software Cover - Half-Life 2 Episode One.jpg
|developer = [[Valve Corporation]]
|publisher = [[WP:Electronic Arts|Electronic Arts]] (retail)<br>Valve Corporation ([[Steam]])
|series = [[Half-Life series]]
|releasedates = June 1, 2006
|genre = [[WP:First-person shooter|First-person shooter]]
|mode = [[WP:Single-player video game|Single-player]]
|platform = {{win|1}}, {{mac|1}}, {{linux|1}}, {{360|1}}, {{ps3|1}}, {{android|1}} ([[WP:Nvidia Shield|Nvidia Shield]])
|engine = {{src|4}} ({{src13sp|1|nt=1}})
|appid = 380
|codelang = [[WP:C++|C++]]
|modsupport = Yes ({{code|custom}} folder, [[Steam Workshop]])
|sdk = [[Source SDK]]
|sysreq = <span></span>
* [[WP:Windows Vista|Win Vista]], [[WP:Windows 7|7]] or later
* 1.7 GHz and/or Dual-core
* 1 [[WP:Gigabyte|GB]] [[WP:Random-access memory|RAM]]
* 6.5 GB disk space
* DirectX 9.0 compatible (with DX 8.1 level card)
''New Engine only. For details, [[#System Requirements|see below]]''
|distribution = Retail, [[Steam]]
|links = {{Steam store|app/380}} (unlisted)<br>{{Steam community|app/220/workshop|Steam Workshop}}<!-- goes to hl2 page instead --><br>{{Moddb|games/half-life-2-episode-one}}
|previousgame = {{hl2lc|2}}<br>{{hl2|2}} (chronologically)
|nextgame = {{hl2ep2|2}}
}}
<span style="color:white; font-weight:bold">Half-Life 2: Episode One</span> is the first in a series of games that reveal the aftermath of {{hl2|1.bold}} and launch a journey beyond [[City 17]]. It focuses on developing [[Alyx Vance|Alyx]] as a character.


==Short Description==
Consciousness returns. [[Gordon]] and Alyx discover they've somehow escaped both the reactor explosion and the [[G-Man]]'s malevolent grasp. Before they can ponder their miraculous survival, the crippled [[Citadel]] lurches back to life just long enough to initiate a self-destruct sequence. With Alyx at his side, Gordon must flee a city in chaos before the Citadel's final detonation turns City 17 into a toxic, mutant-infested crater.
In [[Half-Life]], the [[G-Man]] made you. In Half-Life 2, he used you to defeat [[Dr. Wallace Breen|Dr. Breen]] and start the Resistance. In Episode One, he's lost control.


==The Story So Far==
Aside from the story, the game initially runs on {{src06|1.bold}}, which introduced new features such as [[HDR]], [[$phong|Phong shading]], and [[Source_2006#Features|much more]]. The game was later upgraded to {{src09|1}}, then again with {{src13sp|1}}.
Half-Life introduced the world to bespectacled young physicist [[Dr. Gordon Freeman|Gordon Freeman]], Ph.D. A simple research assistant at the [[Black Mesa Research Facility]], Gordon is thrust into the center of a cosmic war by a teleportation experiment gone badly wrong. Alien creatures from distant alien hellholes scramble through a shattered dimensional barrier and set about butchering the Black Mesa staff as a prelude to exterminating life on Earth. Government forces quickly arrive to eliminate the alien threat. Unfortunately, their methodical killing spree targets every human witness as well. Thanks to an experimental hazard suit, Gordon is able to navigate this violent confusion of creatures, staff, and homicidal soldiers, finally reaching then destroying what appears to be the monstrous source of the infestation. The victory is short-lived, however. Gordon's heroics catch the attention of a sinister interdimensional bureaucrat. The G-Man, as he's come to be called, seals Gordon in stasis far from Earth, thought, and time itself.


Gordon emerges from the darkness, nearly two decades removed from his last conscious thought. The G-Man has reawakened him, though the briefcase-toting official's intentions are murky at best. Gordon is back on Earth, but it is an Earth marred almost beyond recognition by a succession of alien overlords known as The Combine. Gordon finds himself a powerless, faceless citizen of [[City 17]], a grim metropolis in what was once Europe. Whether through luck or the G-Man's subtle influence, he's soon the center of a burgeoning resistance movement led by rebel scientists from Black Mesa, including Gordon's friends, [[Dr. Isaac Kleiner]] and [[Dr. Eli Vance]]. More importantly, Gordon is reunited with his protective [[item_suit|hazard suit]]. With the help of Vance's daughter, Alyx, and her enormous pet robot, [[Dog]], Gordon embarks on a fugitive journey that pits him against [[Combine]] war machines, alien horrors, and the modified human collaborators who enforce The Combine will. Though he is able to rally the resistance into open war against their totalitarian oppressors, Gordon ends up imprisoned in a massive Combine fortress called The [[Citadel]]. Here he meets the Combine's traitorous human liaison, Dr. Wallace Breen. Gordon escapes, and with Alyx at his side, puts an end to Breen's treachery by destroying The Citadel's teleport reactor. As the blast engulfs Alyx and Gordon, the G-Man, his mysterious goals apparently satisfied, reappears to once again toss his pawn into timeless cold storage.
With the release of {{hl2|name}} 20th Anniversary Update in November 16, 2024, both {{hl2ep1|1|nt=1}} and {{hl2ep2|1|nt=1}} are now accessible through {{hl2|name}} main menu. As a result, both episodes are unlisted from the Steam Store.


Consciousness returns. Gordon and Alyx discover they've somehow escaped both the reactor explosion and the G-Man's malevolent grasp. Before they can ponder their miraculous survival, the crippled Citadel lurches back to life just long enough to initiate a self-destruct sequence. With Alyx at his side, Gordon must flee a city in chaos before the Citadel's final detonation turns City 17 into a toxic, mutant-infested crater.
== Content ==
* {{ep1|1}} (<code>episodic</code>)
* {{hl2|1}} maps (<code>hl2</code>)
* Source shared (<code>hl2</code>)
* {{src13sp|1}} engine branch


==Availability==
== Chapters ==
This game is available for purchase on Steam for '''$19.95 (USD)''' bundled with [[Half-Life 2: Deathmatch]], [[Half-Life Deathmatch: Source]], and [[Half-Life 2: Lost Coast]].
{{Chapters|game=ep1}}


It is also available in stores by [[Wikipedia:Electronic Arts|Electronic Arts]] as part of the [[Half-Life 2]]: Platinum Collection.
== Gallery ==
<gallery mode=nolines widths=258px heights=430px>
SourcePic 01.jpg|
Half-Life 2 Episode One - Screenshot_1.jpg|
Half-Life 2 Episode One - Screenshot_2.jpg|
Half-Life 2 Episode One - Screenshot_3.jpg|
Half-Life 2 Episode One - Screenshot_4.jpg|
Half-Life 2 Episode One - Screenshot_5.jpg|
</gallery>


==Playing Half-Life 2 Modifications==
== System Requirements<span id="Sysreq"><!--Used by Sysreq template, clicking on "See system requirements" will send you to this section.--></span> ==
Owners of Half-Life 2: Episode One will be able to play HL2 based mods.
<!-- May include unofficial info alongside official one, just to make sure the game still perform well on any hardware. Most official system requirements, like CS:GO, might be out of date. -->
<!-- Original system requirement: https://web.archive.org/web/20061115201316/http://storefront.steampowered.com/v2/index.php?area=game&AppId=340 -->
<p style="color:white; font-weight:bold">Windows (Old Engine/original requirement):</p>
*OS: Windows [[WP:Windows 98|98]] / [[WP:Windows ME|ME]], [[WP:Windows 2000|2000]], [[WP:Windows XP|XP]] or later<!-- based off 2008 steam's web archive, not sure if LC supports 98 or ME -->
*[[WP:Central processing unit|CPU]]: 1.2 [[WP:Hertz|GHz]] ([[WP:Pentium 4|Pentium 4]] or [[WP:Athlon|Athlon]] 2800+ processor)
*[[WP:Random-access memory|RAM]]: 256 [[WP:Megabyte|MB]]
*Disk space: 4.5 [[WP:Gigabyte|GB]]
*GPU: Nvidia GeForce FX 5700, ATI Radeon 9500
*[[WP:Direct3D|Direct3D]] 9.0 compatible [[WP:Video card|video card]] (with atleast DirectX 7.0 or higher [[DirectX Versions|feature level]]) and 128MB VRAM<br>Some features such as [[HDR]] and [[color correction]] requires DirectX 9.0 or higher graphics card (Nvidia GeForce 6 series or ATI Radeon 9000/X300-X600/X800) series


==Launch Teasers==
<p style="color:white; font-weight:bold">Windows (New Engine):</p>
Valve has announced that there would be several teaser videos focused around Alyx released on Steam before Half-Life 2: Episode One comes out.
*OS: Windows [[WP:Windows Vista|Vista]], [[WP:Windows 7|7]] or later<!-- despite steam requires win10, the game is drm-free so its still works with win7. Steam Deck update broke XP support however. -->
*CPU: 1.7 GHz and/or Dual-core
*RAM: 1 [[WP:Gigabyte|GB]]
*Disk space: 15 GB
*GPU: NVIDIA GeForce 6 series, ATI Radeon X1600, Intel HD Graphics 3000 (with 128MB [[WP:Video random-access memory|VRAM]])
*Direct3D 9.0 compatible [[WP:Video card|video card]] (with atleast DirectX 8.0 or higher feature level)<br>Some features such as [[HDR]] and [[color correction]] requires DirectX 9.0 or higher graphics card.
{{Note|Original disk requirements are 6.5 GB prior to 20th Anniversary Update, which installs {{hl2|1}}, {{hl2lc|1}} and {{ep2|1}} content alongside {{ep1|1}} and thus increase disk space requirements.
Additionally with 20th anniversary update, the highest settings will be more demanding to run on older hardware due to changes to 3D skybox in some maps aswell as LOD being disabled.
}}
{{Note|Due to Steam dropping support for Windows XP/Vista, users need run the game without Steam by running the {{code|hl2.exe}} executable with {{code|-game episodic}}. Running the game without Steam will disable achievements.}}
{{Note|The latest version is no longer compatible with [[WP:Windows XP|Windows XP]] since the 2022 Steam Deck update.<br>Users with Windows XP can downgrade to previous version of the game [[Source/Engine versions#7628|here]]. But please note that this version does not include all the bug fixes and new features that were introduced with Steam Deck and 20th Anniverasry Update.
Users with Collector's Edition copies (which runs on Source 2004, also supporting Win98/ME and 2000), or any Steam copies of Half-Life 2: Episode One since 2013 ([[SteamPipe]]), can play the game without Steam.
}}


* [[HL2:EP1 - Launch Teaser 1|Launch Teaser 1]] - Alyx. Cool Under Pressure.
<p style="color:white; font-weight:bold">OS X:</p>
* [[HL2:EP1 - Launch Teaser 2|Launch Teaser 2]] - Alyx hates zombies. Even more than you do.
*OS: [[WP:OS X|OS X]] 10.5.8, 10.6.3 (up to 10.14.6)
* [[HL2:EP1 - Launch Teaser 3|Launch Teaser 3]] - Alyx. She doesn't have a crowbar, but she's got your back.
*CPU: 2.0 GHz and/or Dual-core
* [[HL2:EP1 - Launch Teaser 4|Launch Teaser 4]] - Alyx. DØg's best friend.
*RAM: 1 GB
*Storage: 15 GB
*GPU: NVIDIA GeForce 8xxx series, ATI Radeon X1600, Intel HD Graphics 3000<br>OpenGL 2.1 compatible
*Audio: OpenAL compatible
{{Note|Mac versions are no longer supported after macOS Catalina (10.15), due to this game only have 32-bit binaries. <!-- Valve later removed macOS binaries in June 12, 2024. --><br>
User can manually build Intel 64-bit/Apple Silicon version of HL2 by [https://www.applegamingwiki.com/wiki/Half-Life_2#Native following this guide]<!-- not sure if this is legal for it to be mention here as the guide rely on using the modified leaked source engine source code -->.}}<!-- the game does not have Mac system requirements on store page, so using the HL2 one instead. -->


== See Also==
<p style="color:white; font-weight:bold">Linux:</p>
*[[Half-Life 2: Episode One Spoilers]]
*OS: Ubuntu 12.04, SteamOS 1.0 or later<br>Other Linux distros supported.
*[[Half-Life 2: Episode One Bugs]]
*CPU: 2.0 GHz and/or Dual-core
*[[Half-Life 2: Episode One Error Reports]]
*RAM: 1 GB
*[http://ep1.half-life2.com/ Official website]
*Storage: 15 GB
*[[Wikipedia:Half-Life 2: Episode One]]
*GPU: NVIDIA GeForce 8xxx series, ATI Radeon X1600, Intel HD Graphics 3000<br>OpenGL 2.1 compatible
*[http://halflife2.filefront.com/file/HalfLife_2_Aftermath_Teaser_Video;45871 Video & Screenshots]
*Audio: OpenAL compatible
*[http://tkv2.teamkilled.net/display/article/half-life-2-aftermath-platinum-price/ Half-Life 2: Aftermath and Platinum pricing revealed]
{{Note|The system requirements for {{hl2ep1|4}} on Linux are unofficial, based off Windows/Mac info, as well as other Source games that support Linux, such as Portal 2.}}
<!-- Same as Mac, doesn't have system requirements on store page. -->


[[Category:Valve Games]]
== Limitations/Bugs ==
*For the list of {{hl2ep1|name}} bugs, see this [https://github.com/ValveSoftware/Source-1-Games/issues?q=is%3Aopen+is%3Aissue+label%3A%22Half-Life+2%3A+Episode+One%22 GitHub] page.
 
== External links ==
* {{cow|Half-Life 2: Episode One}} on '''Combine OverWiki'''
* {{w|Half-Life 2: Episode One}} on '''Wikipedia'''{{Half life games|hidecancelled=true|hide3rdparty=true}}
 
[[Category:Half-Life 2]]
[[Category:Half-Life 2: Episode One]]
[[Category:The Orange Box]]
[[Category:Open source mods and games]] <!-- game code available via Source SDK -->
[[Category:Source 2013 SP engine branch games]]

Latest revision as of 14:47, 14 June 2025

English (en)Hrvatski (hr)Polski (pl)Русский (ru)中文 (zh)Translate (Translate)

Half-Life 2: Episode One
Software Cover - Half-Life 2 Episode One.jpg
Developer(s)
Publisher(s)
Electronic Arts (retail)
Valve Corporation (Steam)
Release date(s)
June 1, 2006
Mode(s)
Steam AppID
Written in
Mod support
Yes (custom folder, Steam Workshop)
System requirements
  • Win Vista, 7 or later
  • 1.7 GHz and/or Dual-core
  • 1 GB RAM
  • 6.5 GB disk space
  • DirectX 9.0 compatible (with DX 8.1 level card)
New Engine only. For details, see below
Distribution
Retail, Steam
Previous game

Half-Life 2: Episode One is the first in a series of games that reveal the aftermath of Half-Life 2 and launch a journey beyond City 17. It focuses on developing Alyx as a character.

Consciousness returns. Gordon and Alyx discover they've somehow escaped both the reactor explosion and the G-Man's malevolent grasp. Before they can ponder their miraculous survival, the crippled Citadel lurches back to life just long enough to initiate a self-destruct sequence. With Alyx at his side, Gordon must flee a city in chaos before the Citadel's final detonation turns City 17 into a toxic, mutant-infested crater.

Aside from the story, the game initially runs on Source 2006, which introduced new features such as HDR, Phong shading, and much more. The game was later upgraded to Source 2009, then again with Source 2013 Singleplayer.

With the release of Half-Life 2 20th Anniversary Update in November 16, 2024, both Episode One and Episode Two are now accessible through Half-Life 2 main menu. As a result, both episodes are unlisted from the Steam Store.

Content

Chapters


Gallery

  • SourcePic 01.jpg
  • Half-Life 2 Episode One - Screenshot 1.jpg
  • Half-Life 2 Episode One - Screenshot 2.jpg
  • Half-Life 2 Episode One - Screenshot 3.jpg
  • Half-Life 2 Episode One - Screenshot 4.jpg
  • Half-Life 2 Episode One - Screenshot 5.jpg

System Requirements

Windows (Old Engine/original requirement):

Windows (New Engine):

  • OS: Windows Vista, 7 or later
  • CPU: 1.7 GHz and/or Dual-core
  • RAM: 1 GB
  • Disk space: 15 GB
  • GPU: NVIDIA GeForce 6 series, ATI Radeon X1600, Intel HD Graphics 3000 (with 128MB VRAM)
  • Direct3D 9.0 compatible video card (with atleast DirectX 8.0 or higher feature level)
    Some features such as HDR and color correction requires DirectX 9.0 or higher graphics card.
Note.pngNote:Original disk requirements are 6.5 GB prior to 20th Anniversary Update, which installs Half-Life 2, Half-Life 2: Lost Coast and Half-Life 2: Episode Two content alongside Half-Life 2: Episode One and thus increase disk space requirements.

Additionally with 20th anniversary update, the highest settings will be more demanding to run on older hardware due to changes to 3D skybox in some maps aswell as LOD being disabled.

Note.pngNote:Due to Steam dropping support for Windows XP/Vista, users need run the game without Steam by running the hl2.exe executable with -game episodic. Running the game without Steam will disable achievements.
Note.pngNote:The latest version is no longer compatible with Windows XP since the 2022 Steam Deck update.
Users with Windows XP can downgrade to previous version of the game here. But please note that this version does not include all the bug fixes and new features that were introduced with Steam Deck and 20th Anniverasry Update.

Users with Collector's Edition copies (which runs on Source 2004, also supporting Win98/ME and 2000), or any Steam copies of Half-Life 2: Episode One since 2013 (SteamPipe), can play the game without Steam.

OS X:

  • OS: OS X 10.5.8, 10.6.3 (up to 10.14.6)
  • CPU: 2.0 GHz and/or Dual-core
  • RAM: 1 GB
  • Storage: 15 GB
  • GPU: NVIDIA GeForce 8xxx series, ATI Radeon X1600, Intel HD Graphics 3000
    OpenGL 2.1 compatible
  • Audio: OpenAL compatible
Note.pngNote:Mac versions are no longer supported after macOS Catalina (10.15), due to this game only have 32-bit binaries.
User can manually build Intel 64-bit/Apple Silicon version of HL2 by following this guide.

Linux:

  • OS: Ubuntu 12.04, SteamOS 1.0 or later
    Other Linux distros supported.
  • CPU: 2.0 GHz and/or Dual-core
  • RAM: 1 GB
  • Storage: 15 GB
  • GPU: NVIDIA GeForce 8xxx series, ATI Radeon X1600, Intel HD Graphics 3000
    OpenGL 2.1 compatible
  • Audio: OpenAL compatible
Note.pngNote:The system requirements for Half-Life 2: Episode One Half-Life 2: Episode One on Linux are unofficial, based off Windows/Mac info, as well as other Source games that support Linux, such as Portal 2.

Limitations/Bugs

  • For the list of Half-Life 2: Episode One bugs, see this GitHub page.

External links

Retrieved from "https://developer.valvesoftware.com/w/index.php?title=Half-Life_2:_Episode_One&oldid=482342"