Plot: Weekday Warrior is a mod for the video game Half-Life 2. It was developed by students at The Guildhall at SMU and released in its final state on 7 June 2006. Weekday Warrior received the Best Mod and best Best Singleplayer FPS Mod awards in the 2007 Independent Games Festival. Wikipedia
Plot: Thinking with Time Machine is a single-player mod for Portal 2 developed by Stridemann, and released by SignHead Studio. It was initially released to Steam on April 18, 2014, for Microsoft Windows, OS X, and Linux systems, available freely to users who own Portal 2 on Steam. Wikipedia
Plot: Action Half-Life is a mod for the first-person shooter video game Half-Life. It strives to simulate action movies, especially those directed by John Woo. Action Half-Life is the second mod in the Action series. The first was Action Quake 2 and the third was Action Unreal Tournament 2004. Wikipedia
Plot: Half-Life: Echoes is a game modification of Half-Life created by British developer James MrGnang Coburn, released on August 10, 2018. The mod was under development for four years and uses the GoldSrc engine. Wikipedia