Black Mesa prototype mods

Everything filed under prototype by its own author, ordered by how much it is used.

1 prototype mods, most downloaded first · newest update 25 Jul 2026

All Singleplayer582 Weapon423 npc264 Sound240 Environment183 Multiplayer123 Music102 Map98 Classic96 hecu79 Creature79 HL174 Single player69 Half Life60 Xen56 Sounds52 MP552 Weapons51 reskin51 hev50 replacement49 Glock49 ReTexture48 shotgun47 fix45 model45 hd45 Texture43 zombie35 joke35 Textures34 survival33 headcrab32 Maps32 skin32 BMCE30 crowbar30 35729 Black Mesa27 Vehicle25 Pistol25 HUD25 Voice25 Soundtrack24 menu23 funny23 Reanimation23 Meme21 sound replacement21 Models20 UI20 vortigaunt19 Localization19 hl218 Custom18 Realism18 SMG17 Suit17 crossbow16 Translation16 Grenade16 Guard16 RPG16 Fun16 half-life 215 4K15 campaign15 Animation15 Audio14 Marine14 Main Menu14 Original13 Zombies13 Revolver12 Sfx11 security11 Russian11 Crab11 Remake11 Realistic11 New11 Decals10 Arms10 Custom Map10 Fixes10 Helicopter10 alien10 Charger9 health9 alyx9 blood9 Deathmatch9 song9 atmospheric9 Military9 Lore Friendly8 Gun8 Ammo7 Barney7 Overhaul7 Plugin7 Playermodel7 Black Ops7 Animations7 Horror7 gman7 Assassin7 Script7 radio7 Item6 jeep6 Improvement6 Effects6 Vehicles6 Hands6 Black6 VGUI6 Scp6 Atmosphere6 human6 Particles6 Player5 Skins5 Update5 marines5 barnacle5 L4D25 Sandbox5 Red5 Props5 Damage5 Alpha5 materials5 Eyes5 Replacer5 9mm5 Humor5 Hat5

1 prototype mods

Most downloaded Most followed Recently updated Newest A to Z

Xen Museum: Enhancedby White and Birdy™Xen Museum Enhanced Playing with sv_cheats 1 (so you can noclip if you get stuck, impulse 101 to refill ammo, etc.) is highly recommended! If you've poked around at the official Xen Museum addon enough, you've probably noticed that the maps are... well, unpolished. None of them have cubemaps, som...252 downloadsupdated 3 mo ago

Only one so far. It 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.