Lever Softworks is a small team dedicated to bringing Valve's interesting unused assets and cancelled projects to the public for viewing and playing.
All the unused content of Half-Life 2: Episode 1. Consult this download's description or the mod's ReadMe.txt for a detailed list of all content contained...
Around 300 maps from the development of Gunman Chronicles. This is nowhere near the full map sources of the game, it is just what I've been able to gather...
Release 1 of the mod. Consult this download's description or the mod's ReadMe.txt for a detailed list of all content contained in it.
The source files of the port. Not really amazing, but it may be interesting to somebody.
This is the whole mod. It includes the 14 challenge chambers as well as the original TFV Mappack.