If you want less graphically intense, browser based is about as unintense as you can get. Two free ones that I have enjoyed are
Kingdom of Loating and
Billy vs. Snakeman.
Kingdom of Loathing is a fantasy parody with some truly excellent writing and stick figure art. I quit because it can get to be a real time sink.
Billy vs. Snakeman is an anime parody which focuses on parodying Naruto, but lots of other stuff gets made fun of too. For instance, recent content even lets you get Haus (Dr. House parody) as an ally. This game doesn't take up nearly as much time.