There are 1 repository under reimplemented-engine topic.
An open-source GoldSrc engine clone (Clean authentic reimplementation without using reverse-engineered code)
reimplementation of the 1994 FPS Nitemare 3D
Dynamte Dan Multiplayer is reimplementation of Dynamite Dan game engine as online multiplayer game
This is a reimplementation of the game Stars! using Java and Spring, persisting to MongoDB. Maybe there will be a UI. Currently it is a demonstration of a pattern, which aims at allowing extensions to be made by other parties.