EDuke32 is a source port of Ken Silverman's Build Engine with support for Duke Nukem 3D, Ion Fury and Shadow Warrior (via VoidSW), among others.

Features include:

• Modern OpenGL rendering with dynamically lighting and shadows
• Voxel assets
• Emulated OPL3, MIDI or OGG/FLAC soundtracks
• Gamepad support
• Classic software rendering

EDuke32 comes with a map editors, Mapster32 and Wangulator, for creation of new levels and is free to use for non-commercial purposes.