The package contains an SDL port of the engine used for the first-person 3D action game "Rise of the Triad".

The ROTT engine is a derivative of the Wolfenstein 3D one, inheriting level design limits like orthogonal walls and flat floor and ceiling heights throughout a map. However, the engine did pioneer panoramic skies, simulated dynamic lighting, fog, bullet holes, breakable glass walls, and synthetic level-over-level environments through use of individual collision objects.