Half-Life : Vertigo
Recommended Files

FlatOut 2 Menu MapFlatOut 2 (2006)
FlatOut 2 Menu Map - a plugin that adds a background 3D menu map to FlatOut 2.

Stone KingdomsStronghold (2001)
A fan-made open-source remake of the legendary Stronghold by Firefly Studios. Built with a modern tech stack, featuring multiple localizations and much more — with original Stronghold artwork generously provided by Firefly Studios and used with their permission — all completely free!

Duke Nukem: Alien ArmageddonDuke Nukem 3D (1996)
Duke Nukem: Alien Armageddon is a large-scale total conversion mod for Duke Nukem 3D that continues the story of the original. It adds a new playable character Bombshell, dozens of enemies, weapons, levels and a character-switching mechanic. This is a content-rich action experience with an emphasis on exploration, AI co-op and modern gameplay.

WolfEnDoom: Project 9Doom II: Hell on Earth (1994)
WolfEnDoom: Project 9 is a total conversion for Doom, inspired by the classic Wolfenstein 3D and modifications like Brutal Wolfenstein. The project brings classic Wolfenstein 3D levels to the GZDoom engine and adds new enemies, weapons, and additional episodes.

Half-Life: RecoveryHalf-Life (1998)
Half-Life: Recovery is a fan-made sequel to Half-Life: Decay. The main protagonist is Colette Green (Gina Cross's partner), and she, together with Dr. Keller, needs to obtain a portable teleportation device to escape Black Mesa — their survival depends on it.

