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Half-Life 2: Episode One continues the story of Half-Life 2. It begins immediately after the end of this game, and follows Gordon Freeman (the player) and Alyx as they attempt to escape City 17 in the wake of the defeat of the Combine forces and the battle in the Citadel.

Gameplay and Gordon's weapon arsenal are identical to Half-Life 2. Enemies too are familiar, with only one new zombie variant. A notable gameplay feature is the behavior of Alyx, who fights along Gordon's side for virtually the entire game. While the player still provides most of the offensive firepower, Alyx does provide a beneficial presence, and is far from the typical cannon fodder AI.

The game has four to six hours of gameplay, and also features a "Commentary" mode, which enables hotspots on each map where the player can listen to developer commentary explaining how or why certain things were done.


Half-Life 2: Episode One Windows A mindless "stalker" works for the Combine in the Citadel. It is believed that "stalkers" were previously ordinary citizens who were arrested, lobotomized, and physically "customized" by the Combine.
Half-Life 2: Episode One Windows Combine Pod
Half-Life 2: Episode One Windows Using an old Trabant to block a hole to stop Antlions coming out
Half-Life 2: Episode One Windows You're taken far away from G-Man.

Promo Images

Half-Life 2: Episode One Screenshot
Half-Life 2: Episode One Screenshot
Half-Life 2: Episode One Screenshot
Half-Life 2: Episode One Screenshot


Alternate Titles

  • "戰慄時空2首部曲:浩劫重生" -- Traditional Chinese spelling
  • "半条命2:第一部" -- Simplified Chinese spelling
  • "Hλlf-Life²: Episode One" -- Cover / in-game title
  • "HL2EP1" -- Common abbreviation
  • "Half-Life 2: Aftermath" -- Working title
  • "Bantiao Ming 2: Diyi Bu" -- Simplified Chinese title
  • "하프라이프 2 에피소드 1" -- Korean spelling
  • "ハーフライフ2 エピソード1" -- Japanese spelling

Part of the Following Groups

User Reviews

More of the same... but that's not a bad thing. Windows Ian Badeer (79)
Pack your gear, Morgan.. I mean Gordon. There's still three episodes to go. Windows Marko Poutiainen (1160)
Has more of the unique level design of HL2, but not much. Windows Andrew Bruck (4)
Half-Life 2: Episode One Is Better Than Star Wars Episode One Windows MasterMegid (902)
About as good as it is long. Windows Peta Michalek (9)

Critic Reviews

Gamernode Windows Jun 02, 2006 9.4 out of 10 94
Bordersdown Windows Jul, 2006 9 out of 10 90
GameSpy Windows Jun 01, 2006 4.5 Stars4.5 Stars4.5 Stars4.5 Stars4.5 Stars 90
Gamers Globe Windows Nov 25, 2006 9 out of 10 90 Windows Jul 10, 2006 88 out of 100 88
GamingExcellence Windows Sep 27, 2006 8.6 out of 10 86
Gameplay (Benelux) Windows May 26, 2006 84 out of 100 84
PC Action (Germany) Windows Jul 16, 2006 82 out of 100 82
Factornews Windows Jun 09, 2006 7 out of 10 70 Windows Jul 16, 2006 7 out of 10 70


There are currently no topics for this game.



Valve development commentary in the game mentions that players seemed to love Dog, so they made him the first thing the player sees at the start of the episode.

Dr. Breen

Apparently, some citizens enjoyed some of the Breencasts. In the game, one citizen can be heard saying to another; "I don't miss Dr. Breen, but I do miss his show. Remember when he had the jugglers on?". This is possibly a reference to the satirical webcomic Concerned (the author of Concerned, however, denies this, believing it to be something of a stretch and citing the absence of jugglers in his strip).

German version

There are changes in some German versions of the game:
  • All blood by humans (including German Freeman) and blood which is part of the level design was coloured green
  • Almost all enemies instantly disappear after being killed. An exception are some dark parts were burning zombies are used as light source.
  • The cries of burning zombies were toned down
  • During the part were Alyx finds the first zombine, the corpse she refers to was removed
A detailed list of changes can be found on (German).


  • 4Players
    • 2006 – #3 Best Add-On of the Year
  • Games for Windows: The Official Magazine
    • March 2007 - #4 Game of the Year 2006
  • GameSpy
    • 2006 – #9 Game of the Year
    • 2006 – #3 PC Game of the Year
    • 2006 – PC Action Game of the Year
    • 2006 – PC Action Game of the Year (Gamers' Vote)
    • 2006 – Best Graphics of the Year (PC)
  • PC Powerplay (Germany)
Information also contributed by Mark Ennis.
Contributed to by GTramp (77633), Shadowcaster (261), Sciere (780240) and Zeppin (8393)