Play Kharkov as the Russians in Battlefield 1942 on single player. I set all the AI settings up to maximum for the AI Germans--I think the highest difficulty was called "impossible," but I might be wrong since it's been a while. So theoretically, I was fighting an enemy team that was impossible to beat. I sat on a hill at our spawn point for the entire game while the AI soldiers bungled their way across the map, their aiming protocols pathetic. We still won. The difficulty was at max, and I sat on my ass the whole time.
Also, I've never been particularly challenged by a Kingdom Hearts or Star Wars Battlefront game. Symphony of the Night was pretty easy too, but that's forgivable since it's so good.