Doomsday Engine free Mac Game

The Doomsday Engine is a GPLv2-licensed source port (incorporating the former jDoom, jHexen, and jHeretic) that runs on Linux, Mac OS X, and Windows. The source port also supports Heretic and Hexen: Beyond Heretic. Its hardware-accelerated engine supports 3D models, object and movement smoothing, shadows, dynamic lighting, and other features. It also includes XG line and sector types for editing extensions, as well as a built-in master server games browser (launcher).

Screenshots from the game Doomsday Engine