- The main article for this category is Limit removing source ports.
“ZDoom is a Doom source port, originally based on ATB Doom and NTDOOM, that was first released in...ZDoom
“GZDoom is a ZDoom-based port which is maintained by Christoph Oelckers (Graf Zahl). It was first...GZDoom
“The Doomsday Engine is a source port with support for Doom, Heretic, Hexen, HacX, and Chex. It...Doomsday
“Boom is a source port created by TeamTNT. The design goals of the Boom project were to create a...Boom
“PrBoom, originally short for "Proff Boom", is a source port for Windows, Linux/POSIX, AmigaOS 4...PrBoom
“PrBoom+ (also PrBoom-plus) is a source port based on PrBoom, GLBoom+ is its associated OpenGL...PrBoom+
“The Eternity Engine is a GPL source port maintained by James "Quasar" Haley and Stephen "SoM...Eternity Engine