Xash3D FWGS engine
Go bindings for raylib, a simple and easy-to-use library
A modern, cross-platform Quake game engine based on FitzQuake.
A completely free, open-source, 2D game engine
DOOM / Heretic / Hexen source port with enhanced graphics and UI
creator : Nikola Lukic about : Visual JS 2d canvas multiplatform game
A basic 3D environment with a first-person POV