Ultima IV RenFair gate scene with ticket taker and player interaction

Half-Life Decay is an updated version of the mod that ports the cooperative expansion Half-Life: Decay, originally released only on PlayStation 2, to PC. It fixes bugs and improves visual and sound effects. The mod allows you to play through the entire campaign in its original form, solo or in co-op.

Half-Life: Residual Life is a single-player campaign for Half-Life from a South Korean team, which is a continuation of the Residual Point mod, where G-Man somehow reboots the space-time continuum, leading to an alternative timeline of events at Black Mesa, where you play as a scientist trying to escape to the surface.

The Moment of Genesis is a major mod from Chinese developers that primarily focuses on gameplay overhaul, adding new units, buildings, and improving visual effects.

Ukrainian localization for the Half-Life: Invasion / Sudden Invasion mods, which fully translates the menus, all in-game text, and partially adds voice acting.

Opposing Force: Enlightened - a mod for Half-Life: Opposing Force that adds a lot of new weapons, improves lighting, effects, and atmosphere of the original campaign, making it visually more modern without changing the storyline.