Cossacks II: Battle for Europe

Doom 4 Vanilla is a gameplay mod for Doom II whose goal is to show what Doom (2016) could have been like if it had been released in 1993. It overhauls weapons, enemies, graphics, and sound, using DeHackEd tricks to convey the dynamics and aggression of modern Doom within the limitations of the original Doom II engine.

Shrine Of Kalgadar is a fantasy action-adventure on the Doom engine, inspired by the atmosphere of Diablo, early Quake, Hexen 2, and Morrowind. 21 maps, 3 classes, 29 tracks, and 3-5 hours of gameplay. Dark dungeons, islands, and co-op for up to 4 players.

Lambda-Strike is a weapon mod for Doom that brings the Counter-Strike 1.6 arsenal into the game, faithfully recreating animations, HUD, shooting mechanics, recoil, and the caliber system.

Cat Life: GS - a mod for Half-Life that allows you to look at the game world through the eyes of a furry hero. You play as cat XFC-71, known as Newton, who became the subject of scientific experiments. After the incident at Black Mesa, he finds himself at the center of events, facing mutated creatures and military forces.

LibreQuake is an open-source remake of Quake, designed both as a standalone game and as a replacement for the original commercial assets, allowing players to run not only the game itself but also mods without needing to own the original Quake.