"Half-Life: Opposing Force Coop" allows you to experience the epic Opposing Force story and environment with your friends, or with players around the world. Half-Life and Half-Life: Opposing Force on either WON or Steam is required to play. You must also either have an LAN or internet connection.
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Hazardous Course 2 Coop
Multiplayer MapHazardous Course 2 a half life 1 mod by richman convert it to coop by aear Story : The Hazardous-Course 2 is a spoof of the original "Hazard-Course" from...
Under The Black Moon Coop
Multiplayer Map 2 commentsUnder The Black Moon a opposing force mod made by TheUnbeholden Convert it to coop by AEAR 9 maps of tough goodness that will make a soldier cry for joy...
MiniMicus Coop
Multiplayer MapMINIMICUS a Half-Life Mod Made by someone named Petrick. Story : The scientists at Black Mesa have invented a shrinking machine. They are shrinking Xen...
Peace Like Us Coop
Multiplayer MapHalf-Life: Peaces like Us is a singleplayer modification for Half-Life Made By Rikku2000. Convert To Coop By AEAR Story: Mankind found an entrance to...
Big Lolly Coop
Multiplayer MapBig Lolly is a half life mod made by adamdenton1 Opposing Force Coop v2 mod by zhouy Convert to Coop by AEAR the map its good for 2-5 players note : first...
Bootleg Squadrog Coop
Multiplayer Map 6 commentsThe author of this mappack "Brendon Chung" was disappointed with the lack of teamwork in the Opposing Force single-player mode, and developed Bootleg...
Nuclear Winter Coop
Multiplayer Map 6 commentsThis mappack "Nuclear Winter" is an Opposing Force mod by Mr. White, which story takes place at North America year 2017 A.D. 8-9 players can now experience...
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