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
- Beta-ish Opposing Forceby dydwk747Resourcesupdated 5 y ago
- Half-Life: Opposing Force - Press Demo Releaseby Vect0R!Resourcesupdated 3 y ago
- Amaphel (OP4 CTF)by UnunoctiumMaps / Capture the Flagupdated 5 y ago
- HQ NV noise sprites and in different amountsby B-to480Sprites / Nightvisionupdated 5 y ago
- Use Noclip in Opposing Force Intro & Outro Mapsby lymphoidMaps / Other/Miscupdated 3 y ago
- beach_headby djearthquakeMapsupdated 5 y ago
- Real M40 Reticleby AmaruqSprites / Scopeupdated 6 y ago
- Clean Nightvisionby 1Vodker1Sprites / Nightvisionupdated 6 y ago
- [ESP] Traduccion Def. Half-Life Opposing Forceby Ghost1432802Resourcesupdated 3 y ago
- Half-Life: Opposing Force LOADING backgroundby Ghost1432802Menu Backgroundupdated 3 y ago
- Opposing Force Beta (Early Concepts Mod)by BenedictKapustin42Resourcesupdated 6 y ago
- Opposing Force CD WON/Pre-Steam backgroundby Ghost1432802Menu Backgroundupdated 3 y ago
- Randomized background (XASH 3D)by YisusManMenu Backgroundupdated 6 y ago
- OpFor green loading textby /TheWolfResourcesupdated 3 y ago
- fixed hl op4 player models portraitsby ssfcgaslsgoMenu Backgroundupdated 6 y ago
- Killhouse from Call of Duty 4by STAHP.exeMaps / Deathmatchupdated 13 mo ago
- op4_coldsiteby dr.ColaMaps / Deathmatchupdated 7 y ago
- Under the Black Moon Campaignby YellowJelloSingle Playerupdated 3 y ago
- Half-Life: Opposing Force Demoby AoMResourcesupdated 8 y ago
- op4_2018_the_beachby twitch_hlMaps / Deathmatchupdated 8 y ago
- op4_zombie_battlegroundby twitch_hlMaps / Deathmatchupdated 9 y ago
- op4_just3by fshy2010Maps / Deathmatchupdated 10 y ago
- op4_just2by fshy2010Maps / Deathmatchupdated 10 y ago
- op4_1hpby fshy2010Maps / Deathmatchupdated 10 y ago
- op4_justby fshy2010Maps / Deathmatchupdated 10 y ago
- op4_100hpby fshy2010Maps / Deathmatchupdated 10 y ago
- op4_forestby fshy2010Maps / Deathmatchupdated 10 y ago
- op4_envby fshy2010Maps / Deathmatchupdated 10 y ago
- op4_35hpby fshy2010Maps / Deathmatchupdated 10 y ago
- op4_yard_rpgby fshy2010Maps / Deathmatchupdated 10 y ago
- op4ctf_orange_snowby CybermaxMaps / Capture the Flagupdated 9 y ago
- op4ctf_orangeby CybermaxMaps / Capture the Flagupdated 11 y ago
- op4ctf_orange_bridge_v2by CybermaxMaps / Capture the Flagupdated 11 y ago
- op4_snowmesaby dr.ColaMaps / Deathmatchupdated 11 y ago
- op4_warpby PersephoneMaps / Deathmatchupdated 11 y ago
- Opposing Force WON Menu Re-Creationby HowardHeymanMenu Backgroundupdated 9 y ago
- "Operation Black Mesa" Epic Backgroundby X RaYMenu Backgroundupdated 11 y ago
- "Forget About Freeman" Epic Backgroundby X RaYMenu Backgroundupdated 11 y ago
- Adrian Shepard BM Modelby CS PROMenu Backgroundupdated 11 y ago
- Opposing Force Cartoonby THE-KILLER.555Menu Backgroundupdated 11 y ago
- HD Hud fixby RaraCerberusSprites / HUDupdated 3 y ago
- OBM + Soundby AtakyMenu Backgroundupdated 12 y ago
- Nice Opposing-Force GUIsby GuestMenu Backgroundupdated 12 y ago
- Half-Life Opposing Force FGD with animationsby Ghost1397314Resourcesupdated 10 y ago
- op4_raptorsiteby dr.ColaMaps / Deathmatchupdated 12 y ago
- Opposing Force blank WON backgroundby dethtollMenu Backgroundupdated 12 y ago
- op4_cliffmesaby dr.ColaMaps / Deathmatchupdated 12 y ago
- Adrian Shephard Lostby AtakyMenu Backgroundupdated 13 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.