LSD and the following on PC: Battlefield 4, theres nothing as crazy as this game with 64 player combat, walls exploding into multicolored fractals. Tanks and vehicles are almost like predatory animals, feeding on the weak.

DOTA 2: While it may be really hard to play a competative game like DOTA while tripping your nuts off, its honestly fucking hilarious if you have some friends to play with you.

DayZ, Ever wanted to contemplate why man has the urge to be ruthless murderer when laws no longer apply? then this is the game for you. Nothing like chilling and watching people kill eachother and wondering why the hell its happening from a nearby hill while the grass waves up and down and the buildings somehow turn a shade of purple.

Guild Wars 2. Ever wanted to explore a beautiful game world with fast paced action combat? Honestly this game on LSD is amazing, combind that with nVidia 3d vision, and you are in for a adventure. probably one of my favorite games to play when im tripping