If you play PC games and think you can get into an abstract/artsy game with no real point, I'd definitely recommend Proteus. Especially getting stoned and playing Proteus. It's a randomly generated island with music that changes as you explore, I dicked around for probably 45 minutes last night with a big grin plastered on my face. Also, Dream is pretty neat, you explore this guys dreams and try to solve puzzles. Apparently that old playstation game LSD was a big influence on it. It's still in development, and I couldn't figure out the one puzzle I found, but it looks promising. Apparently when they're done they're going to have some nightmares thrown in as well. I'll have to devote more time to it before I decide how I really feel about it, but so far I'm intrigued.