# Half-Life: Opposing Force

> 1999 expansion pack for the science fiction first-person shooter video game Half-Life

**Wikidata**: [Q693937](https://www.wikidata.org/wiki/Q693937)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Half-Life:_Opposing_Force)  
**Source**: https://4ort.xyz/entity/half-life-opposing-force


## References

1. AreWeAntiCheatYet
2. Steam
3. redump.org
4. MusicBrainz
5. Freebase Data Dumps. 2013
6. game credits
7. [MobyGames](https://www.mobygames.com/game/1157/half-life-opposing-force/credits/windows/?autoplatform=true)
8. [Black Mesa Research Facility | Half-Life Wiki | Fandom](https://half-life.fandom.com/wiki/Black_Mesa_Research_Facility?oldid=311755#List_of_appearances)
9. [Half-Life: Opposing Force | Half-Life Wiki | Fandom](https://half-life.fandom.com/wiki/Half-Life:_Opposing_Force)
10. [IGCD.net: Vehicles/Cars list for Half-Life: Opposing Force](https://igcd.net/game.php?id=1000015643)
11. [PCGamingWiki](https://www.pcgamingwiki.com/wiki/Half-Life:_Opposing_Force)
12. Giant Bomb
13. Q124398839
14. [Source](https://github.com/AreWeAntiCheatYet/AreWeAntiCheatYet/blob/master/games.json)
15. [Half-Life: Opposing Force - Combine OverWiki, the original Half-Life wiki and Portal wiki](https://combineoverwiki.net/wiki/Half-Life:_Opposing_Force)
16. GOG Dreamlist
17. VGChartz