Lets see here, [SCP - Containment Breach], released in 2012, uses Blitz3D v1.108. Its a 3D FPS supernatural horror game, with the goal being to escape from the containment center during a containment breach of dangerous anomalies. Games feature procedurally generated maps made by connecting a random selection of pre-existing rooms and hallways together.
Hm, I've seen this floating around Youtube before, wasn't aware the source was available. Having a hard time digging up documentation on Blitz3D though, there's a paperback version [here] for 22$, and a crash course PDF [here]. It seems Blitz3D's audio is still rather basic, it has music and sound playing capability, looping, and volume control, but that seems to be it.
Considering were talking about a 3D FPS here, have you given much thought as to what kinds of accessibility features to implement? Pre Recorded speech, Cane System, etc.
-
BrushTone v1.3.3: Accessible Paint Tool
-
AudiMesh3D v1.0.0: Accessible 3D Model Viewer