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
- op4_colasiteby dr.ColaMaps / Deathmatchupdated 13 y ago
- Op4_residual_storageby The TruthMaps / Deathmatchupdated 13 y ago
- Shepard Forgottenby AtakyMenu Backgroundupdated 13 y ago
- 2bases 1.3by XylemonMaps / Capture the Flagupdated 3 y ago
- Oppossing Forceby AtakyMenu Backgroundupdated 13 y ago
- Adrian Shephard Opposing Forceby AtakyMenu Backgroundupdated 13 y ago
- Old console Opposig Forceby MAXTER_SNAKEMenu Backgroundupdated 13 y ago
- op4_guldsiteby dr.ColaMaps / Deathmatchupdated 14 y ago
- Operation Black Mesaby MAXTER_SNAKEMenu Backgroundupdated 14 y ago
- Battlefield Sniperby MAXTER_SNAKESprites / Scopeupdated 14 y ago
- HUD HD editionby MAXTER_SNAKESprites / HUDupdated 3 y ago
- Mosin Nagantby MAXTER_SNAKESprites / Scopeupdated 14 y ago
- Scanlinesby MAXTER_SNAKESprites / Nightvisionupdated 14 y ago
- Opposing Force Background v2by xlvxroMenu Backgroundupdated 13 y ago
- Opposing Force Backgroundby xlvxroMenu Backgroundupdated 13 y ago
- HL-Op4rby (Tikus Kali)Menu Backgroundupdated 15 y ago
- Campaign Part 1by Pyromancer12Single Playerupdated 3 y ago
- Shepard's adventuresby noSICKSingle Playerupdated 15 y ago
- HL:OP4 Old-Skool GUIby EMEUTIERMenu Backgroundupdated 15 y ago
- op4_computerroomby Ghost1241609Maps / Deathmatchupdated 16 y ago
- op4_amphitheatrumby xDDGxMaps / Deathmatchupdated 15 y ago
- Op4_Baseby NinjaBlackMaps / Deathmatchupdated 16 y ago
- ctf_box_fortby JTMK-USAMaps / Capture the Flagupdated 3 y ago
- DropIn_Bby SultanoswatMaps / Deathmatchupdated 17 y ago
- Cross Boxby JTMK-USAMaps / Deathmatchupdated 17 y ago
- Coldplexby JTMK-USAMaps / Deathmatchupdated 23 mo ago
- mario airby patch311Maps / Deathmatchupdated 17 y ago
- mario landby patch311Maps / Deathmatchupdated 17 y ago
- Half-Life: Army Men Installerby IIopnResourcesupdated 5 y ago
- op4_crozfireby dESTROYER+Maps / Deathmatchupdated 3 y ago
- op4_peruskoulu15 - Peruskoulu 1.5by SycoMaps / Deathmatchupdated 16 mo ago
- Siberiaby SycoMaps / Deathmatchupdated 8 mo ago
- Valorby kungfusquirrelMaps / Deathmatchupdated 2 y ago
- Tortuosityby kungfusquirrelMaps / Capture the Flagupdated 2 y ago
- smalloneby SycoMaps / Deathmatchupdated 3 y ago
- Repair Bay 5by kungfusquirrelMaps / Deathmatchupdated 2 y ago
- op4_underbaseby SycoMaps / Deathmatchupdated 19 y ago
- op4_gmdm1by SycoMaps / Deathmatchupdated 15 mo ago
- Entrenchmentby SycoMaps / Deathmatchupdated 3 mo ago
- Camper Huntingby SycoMaps / Deathmatchupdated 8 mo ago
- Tension CTFby SycoMaps / Capture the Flagupdated 3 y ago
- op4bd_reactor - Reactor Complexby SycoMaps / Deathmatchupdated 3 y ago
- Tensionby SycoMaps / Deathmatchupdated 20 mo ago
- Tauby SycoMaps / Deathmatchupdated 20 mo ago
- Sniperingby SycoMaps / Deathmatchupdated 20 mo ago
- Shooteringby SycoMaps / Deathmatchupdated 20 mo ago
- Cityby SycoMaps / Deathmatchupdated 20 mo ago
- Omenby kungfusquirrelMaps / Capture the Flagupdated 2 y 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.