As usual, I’m late to the party on this one. While not explicitly about Halloween, Don’t Starve is a fun little Minecraft-esque grindy/harvesty indie title that lets you run around (for a while) in a weird, monochromatic cartoon world. The art is very Tim Burtony, and the music is pleasingly waltzy. You need to harvest resources and build stuff to help you stay alive, AND you need to attend to your character’s ever-increasing hunger. AND you need to worry about going insane, because there are monsters and shit that freak your guy right the hell out.
Be warned, however: this game is maddeningly addictive, and incredibly frustrating. You will die. You will die a lot. Oh, you just built a house after ages of chopping/mining/other mindless harvesting activity? BOOM: lightning bolt, sucka. Oh, you built your house of stone so it won’t burn? Freakin’ WEREWOLVES.
Seriously, my last game I was doing SO WELL, and I retreated into my nice stone house when night fell, thinking I was safe. AND THEN A GODDAMNED PACK OF WEREWOLVES CAME AND DESTROYED MY HOUSE AND KILLED ME. AHHHHHH.
So, er, fair warning.
Don’t Starve is on sale for 50% off as of this writing. See the official site, or check it out on Steam.
The Angry Scholar 
Sounds too dangerous for me right now. I’m going to try to forget I ever read this 🙂
Very very dangerous indeed (I say as I turn back to my game in progress).