Smod
Sven-Coop
Lambda Wars
Empires
Missing Information
Neo Tokyo (Dead :( )
Double Action : Boogaloo
The Specialists
Cry of Fear
Synergy
Obsidian Conflict
Smod 2
Smod Outbreak
Smod: Crylife
Smashball (Ded)
Smod: Final
Gmod
Fortress Forever
Half-Life 2: Downfall
Half-Life:Decay
From Earth
Fast Detect
Zombie Master
Dystopia
Zombie Panic Source
Half-Life 2: Capture the Flag
Underhell
Half-Life 2: Awakening
Wilson Chronicles
Santa's Revenge 2
Go-Mod
Black Mesa
Silent Escape
HL2: Classic
Dark Interval
Dead Lab
Entropy Zero
The PTSD mod
JBMod
Resident Evil 2: Source
Half-Life: Blue Shift-Source
Black Mesa: Black Ops
might post s'more
I would say Alien Swarm since its Technically a mod but idk