Surreal Engine aims to recreate key elements of the original Unreal Engine to allow for playing Unreal Tournament (UT99) maps. Currently, the engine is capable of loading and rendering maps, and has mostly completed the Unrealscript VM, but there are still some features and functions that are not fully implemented. The project can detect various UE1 games, with only Unreal Tournament v436 and Unreal Gold v226 being relatively playable. Other games and UT versions may result in crashes. Detailed instructions for Windows and Linux builds are provided, with additional information on dependencies and optional features such as SDL2.
https://github.com/dpjudas/SurrealEngine