Clean-room implementation of Half-Life 2 on the Quake 1 engine
A fan project rebuilds a modern classic inside a 1996 engine...
Deep Dive
A developer has created a 'clean-room' port of Valve's 2004 classic Half-Life 2 to the 1996 Quake 1 engine. The project, called Rad-Therapy II, has 69 commits and is built on the Nuclide/FteQW engine. It currently supports deathmatch and other modes but is not a complete, playable story campaign. The port requires users to supply their own Half-Life 2 game data files to function.
Why It Matters
It demonstrates the extreme technical limits of retro game engines and passionate modding communities.