SImply put, Snowhorse is a game about a snowboarding horse. You snowboard down a mountain, and you do tricks. You can dress your horse in some amazing gear.
I wanted to include this game because of it's sheer fun. If this game were a movie, it'd be Weekend at Bernie's, or Ernest Goes to Camp or something. It's controls and physics are hilarious (read: it's not a snowboard simulator) and sometimes landing (or not landing) tricks doesn't quite make sense, but it's silly and fun which is something that gets passed over too often anymore.