All of these games here are games that I have played for a long time and would not be against playing right this very instant. It's cool to see that Ocarina of Time is getting a big modding scene at the moment. I guess honorable mentions by playtime would be CS:GO, but even though I have 1300 more hours on it than CS:S, I still consider CS:S to be the best one of them all. Payday: The Heist could technically be on here too, but I've pretty much burnt out on that game. How did I get 635 hours out of a game with 9 levels? Who knows, the game is good. More obligatory gamecube games are Melee, Chibi Robo, and Kirby Air Ride. Another game I considered was Army Men: RTS for gamecube. Really fun game but I need to beat it legitimately because I had to use cheats as a kid.
I would've done a theme with glitches, but it's kinda tricky for a few of them unless I compiled them myself, which I really don't want to do. I don't even know any Quake III glitches.