DarkPlaces is a gameplay modification and a source port engine based on the
computer game Quake.[3] It adds enhanced network code, with asynchronous delta
compression inspired by Tribes networking,[citation needed] a built in server
browser,[4] real-time lighting,[4][5] and bump mapping,[4][5] makes use of the
OpenGL Shading Language[4] and supports Ogg Vorbis.[4]
DarkPlaces is actively developed by Forest "LordHavoc" Hale[4] and contributors.
It is based on the Quake source code.[4]
Games that use DarkPlaces include Nexuiz,[6][7] Transfusion, and Nehahra (and by
extension the machinima film The Seal of Nehahra).