Originally released on Xbox LIVE Arcade and PlayStation Network, Costume Quest was a fun mini-RPG that took a fun costuming mechanic and a great sense of humor and quickly became one of the best downloadable games around. Now, Double Fine is spreading the love to the PC. Being distributed on Steam later this year, Costume Quest will offer all of the great features of Costume Quest, with the added pack-in bonus of the game's DLC pack, Grubbins on Ice, for free...