Gothic castle arena combat in Quake Epsilon Build mod

Half-Life: Operation Rosenberg is a single-player modification for Half-Life and Opposing Force, in which you take on the role of Corporal Timothy Collins, a HECU Marine tasked with finding Dr. Rosenberg and traveling with him to the secret sector A-99 of the research complex.

Portal: Still Alive For PC is a mod that brings the Xbox 360-exclusive levels from Portal to PC. It includes 14 bonus chambers with improved lighting, the original Flash Mappack, an additional map featuring GLaDOS voiceover, and a restored cut ending. Challenge versions of the levels are also available.

Strongholds Of Conquest is a mod that completely overhauls AI castles in Stronghold Crusader, bringing them closer to historical designs. Castles now feature realistic and unique layouts, and the AI characters' performance and combat capabilities have been enhanced to a challenging level.

Sven Co-op is a cooperative mod for Half-Life where players team up to complete the campaign and custom maps together, featuring improved AI and new gameplay features.

Time Tripper is a surrealistic total conversion for Doom II on GZDoom, in which the player, as Doomelph, travels through space and time, fighting reworked and new demons on neon and liminal levels with a pronounced arcade style.