Plot: Tag: The Power of Paint is a first-person action and puzzle hybrid video game. The game was developed in 2009 for Microsoft Windows by Tag Team, a group of students from the DigiPen Institute of Technology. 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: Seum: Speedrunners from Hell is an independent video game developed by Pine Studio and published by Headup Games. It was released on Steam on July 28, 2016, on Xbox One in September 2017, on PlayStation 4 in October 2017 and onto GOG.com on October 12, 2018. Wikipedia
Plot: Narbacular Drop is an environmental puzzle video game developed by Nuclear Monkey Software. It was released for free online in 2005 for Microsoft Windows. It was the senior game project of students attending DigiPen Institute of Technology. Wikipedia
Plot: Aperture Tag: The Paint Gun Testing Initiative is a 2014 first-person puzzle-platform video game developed by the Aperture Tag Team. Originally made as a mod of Valve's Portal series, it was released on July 15, 2014. Wikipedia
Plot: Portal Stories: Mel is a single-player mod for Portal 2 developed by Prism Studios. The mod was released on June 25, 2015, for Microsoft Windows, OS X and Linux systems, available freely to users who own Portal 2 on Steam. Wikipedia
Plot: Postal 4: No Regerts is a first-person shooter video game developed by Running with Scissors, who were also responsible for the first two games in the Postal series, Postal and Postal 2. Wikipedia
Plot: Trine 3: The Artifacts of Power is a 2015 action-adventure puzzle-platform video game developed by Frozenbyte, released on August 20, 2015 for Microsoft Windows. A PlayStation 4 version was released on December 22, 2015. Wikipedia