Cross-platform development is perhaps finally coming out of its slump of the last few years. Each platform has born the brunt of sloppy ports, but developers are beginning to show signs of taking far more care when they intend their game to appear on 360, PS3 and PC at once. This gets trickier when you want to catch the Wii and DS market, mind you, and often the result is extremely compromised versions of the original, possibly with a couple of lazy hand/stylus-waggling mini-games. Or there's Codemasters' approach with Overlord, making three completely different games.
For those unfamiliar, the Overlord games have you control a cruel, evil figure who lords over a gang of minions. Your primary interaction with the game is to send off your critters to do your bidding, while able to muck in on the action when needs must.