[IshKebab]

The engine was all C. QuakeC was used to script the game logic - how weapons behave, doors open, items move around, etc. It was reasonably powerful. You could make grappling hooks, proximity mines, etc.

I guess the core mechanics of Quake were very obvious. It wasn't a very innovative game in that sense; basically identical to Doom but with way fancier graphics, controls and so on.

[int_19h]

QuakeC was powerful enough to create mods like Quess (https://www.youtube.com/watch?v=TD2Qz_hH2U4) and Quake Rally (https://www.youtube.com/watch?v=Fg0hTSLE-NM). Although the latter was really pushing the limits of the engine.

And lest we forget, Reaper Bot, the thing that made PvE deathmatch a reality.

To this day I'm amazed that so much cool stuff was done in QuakeC despite the language not even having arrays...