Half-Life: Opposing Force
Half-Life: Opposing Force mods
A mod changes the game itself. It needs something to load it, it may need other mods first, and it only works on the versions its author built it for.
739 mods · newest update 18 Sep 2026
- keved_hl1_op01 - Jaw Operationby SycoMaps / Deathmatchupdated 3 y ago
- Gauntletby kungfusquirrelMaps / Capture the Flagupdated 20 mo ago
- keved_hl1_op03 - Eliminatorby SycoMaps / Deathmatchupdated 3 y ago
- Ceasefireby SycoMaps / Capture the Flagupdated 3 y ago
- keved_hl1_op04 - Burning Hateby SycoMaps / Deathmatchupdated 3 y ago
- keved_hl1_op07 - Assault on Pelham 123by SycoMaps / Deathmatchupdated 3 y ago
- keved_hl1_op02 - Bone Operationby SycoMaps / Deathmatchupdated 3 y ago
- OP4:CTF WON version - retailby NAPOLEONResourcesupdated 7 y ago
- OP4:CTF Manualby NAPOLEONResourcesupdated 7 y ago
- Bloodbathby CeltMaps / Deathmatchupdated 8 mo ago
- Regular grappling & rope testing mapMaps / Other/Miscupdated 1 mo ago
- op4_ag_crossfireMaps / Deathmatchupdated 3 mo ago
- Boot Camp eXtremeMaps / Deathmatchupdated 3 mo ago
- HeavypoleMaps / Deathmatchupdated 3 mo ago
- Vacant TownMaps / Deathmatchupdated 3 mo ago
- X-bounce 3Maps / Deathmatchupdated 3 mo ago
- ObsoleteMaps / Deathmatchupdated 3 mo ago
- VertigoMaps / Deathmatchupdated 3 mo ago
- 1337_streetMaps / Deathmatchupdated 3 mo ago
739 mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.