Strategic cube placement using portal gun in Portal 2007 puzzle room

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.

Afraid of Monsters: Dark Assistance is a cooperative version of the cult horror mod for Half-Life. You play as drug addict David Leatherhoff, who battles hallucinations and monsters in his own distorted mind. The mod offers both cooperative and single-player gameplay, improved graphics, new weapons, and redesigned maps.

Ukrainian localization patch for Half-Life: Black Ops mod that fully translates the menu, all in-game text, and comics.

Catharsis is a short but atmospheric mod for Half-Life that tells the story of an unnamed scientist trying to escape from Black Mesa during the disaster.

Rise of the Reds is one of the most extensive and well-known mods for C&C: Generals Zero Hour, which adds two new factions and updates existing ones, introduces modern and near-future technology, new abilities and technologies, improved AI, as well as new maps for skirmishes and multiplayer.