Back Half-Life 2: Episode One Afrikaans هاف-لايف 2: أيبيسود ون Arabic هالف ليف 2: اپيسود اون ARZ Half-Life 2: Episode One Catalan Half-Life 2: Episode One Danish Half-Life 2: Episode One German Half-Life 2: Episode One Spanish نیمهعمر ۲: قسمت نخست Persian Half-Life 2: Episode One Finnish Half-Life 2: Episode One French
| Half-Life 2: Episode One | |
|---|---|
 Cover art showing key character Alyx Vance | |
| Developer(s) | Valve |
| Publisher(s) | Valve |
| Writer(s) | |
| Composer(s) | Kelly Bailey |
| Series | Half-Life |
| Engine | Source |
| Platform(s) | |
| Release | |
| Genre(s) | First-person shooter |
| Mode(s) | Single-player |
Half-Life 2: Episode One is a 2006 first-person shooter game developed and published by Valve for Windows. It continues the story of Half-Life 2 (2004); as scientist Gordon Freeman, players must escape City 17 with Gordon's companion Alyx Vance. Like previous Half-Life games, Episode One combines shooting, puzzles and storytelling.
After the six-year development of Half-Life 2, Valve switched to episodic development, hoping to release games more frequently. For Episode One, they focused on developing the character of Alyx and expanded her artificial intelligence. It uses an updated version of Valve's Source engine, with new lighting and animation technology.
Episode One received mostly positive reviews; the co-operative gameplay with Alyx received particular praise, although the short length was criticized. It was ported to Xbox 360 and PlayStation 3 as part of the 2007 compilation The Orange Box. Episode Two followed in 2007.
- ^ "The Orange Box for Xbox 360: Release Summary". GameSpot. CNET Networks, Inc. Archived from the original on June 2, 2013. Retrieved March 16, 2013.
- ^ "The Orange Box PlayStation 3: Game Editions". IGN. Archived from the original on March 7, 2016. Retrieved March 30, 2016.
- ^ "Half-Life 2, Half-Life 2: Episode One and Half-Life 2: Episode Two Updates Released". Steam. Valve. May 26, 2010. Archived from the original on December 10, 2015. Retrieved May 26, 2010.
- ^ "Half-Life 2: Episode One updated". Steam. Valve. June 26, 2013. Archived from the original on April 23, 2014. Retrieved January 2, 2014.
- ^ "Half-Life 2: Episode One - Apps on Google Play". Archived from the original on May 1, 2022. Retrieved May 1, 2022.