Engines

Adventure Game Studio
Used by
Resonance, Blackwell series, Primordia, The Shivah, The Cat Lady, Ben Jordan: Paranormal Investigator, Gemini Rue, Technobabylon, Ben There, Dan That!, King's Quest I-III, Al Emmo and the Lost Dutchman's Mine, Metal Dead, Chzo Mythos, Blackwell Epiphany
CaesarIA
Used by
Caesar III
Cube 2
Used by
Cube 2: Sauerbraten, Red Eclipse
FreeSpace 2 Open
Used by
FreeSpace 2, FreeSpace Port, The Babylon Project, Blue Planet, Wing Commander Saga: The Darkest Dawn, Diaspora: Shattered Armistice
FreeSynd
Used by
Syndicate
GemRB
Used by
Baldur's Gate, Baldur's Gate 2, Icewind Dale, Icewind Dale II, Planescape: Torment
ioquake3
Used by
OpenArena, ZEQ2 Lite, Smokin' Guns, World of Padman, Tremulous, Quake III Arena
ManaPlus
Used by
The Mana World, Evol Online
OpenMW
Used by
The Elder Scrolls III: Morrowind
ResidualVM
Used by
Grim Fandango
ScummVM
Used by
Broken Sword: The Shadow of the Templars, Broken Sword II: The Smoking Mirror, Broken Sword 2.5: The Return of the Templars, Lure of the Temptress, Beneath a Steel Sky, The Curse of Monkey Island, Simon the Sorcerer, Simon the Sorcerer II: The Lion, the Wizard and the Wardrobe, King's Quest I-III, I Have No Mouth and I Must Scream, Flight of the Amazon Queen, TeenAgent, Full Throttle, Drascula: The Vampire Strikes Back, The Journeyman Project: Pegasus Prime
Source
Used by
Half-Life 2, Left 4 Dead 2, Portal, Portal 2, Team Fortress 2, Fistful of Frags
Spring
Used by
Spring: 1944, Balanced Annihilation, Conflict Terra, Kernel Panic, The Cursed, Evolution RTS, Zero-K, NOTA