Eternity Engine

The Eternity Engine is a GPL source port maintained by James "Quasar" Haley and Steven "SoM" McGranahan. It was originally meant to power the Eternity total conversion, but after the project went on hiatus, the engine became the prime focus. The engine is based on Smack My Marine Up (SMMU).

Both the Mordeth and Doom Millennium projects are being developed for the Eternity Engine.