Open source re-implementation of Tomb Raider I and Tomb Raider II, along with additional enhancements and bugfixes

Tomb Engine is a new and modern engine for custom Tomb Raider levels, incorporating classic features and new enhancements.

Classic Tomb Raider open-source engine

An open-source Tomb Raider 1-5 engine remake

Tomb Raider: Chronicles Disassembly translated to C source code.