original question: what Video Game Developer is the Developer of a Video Game Mod that uses game engine [Source Engine]?
answer: facepunch studios, team garry
answer type: Video Game Developer.
auxiliary information: Source is a 3D video game engine and the successor for GoldSrc both developed by Valve Corporation. It debuted in June 2004 with Counter-Strike: Source, followed shortly by Half-Life 2, and has been in active development ever since. Source does not have a meaningful version numbering scheme; instead, it is designed in constant incremental updates. Source was created to power first-person shooters, but has also been used professionally to create other genres of video games.
What is the name of the Video Game Developer that developed a Video Game Mod that uses the game engine [Source Engine]?