Its not a game really, nor does it portray Palin in a particularly favourable light but I thought I’d post it nonetheless. Try Palin As President here.
Another Palin thing I’ve found is this Tea Party based “Palin’s Tea Bomber” game, based on her involvement with the Tea Party movement. It again seems to make her appear foolish, but no one really comes off well in this. It’s hosted on the awful Addicting Games.