A massive amount of RPG's are coming to the 360. The game reminds of Oblivion, but it's totally different. It'll be released before the end of this year
Bully: Scholarship Edition was an Xbox 360 & Wii re-release of the PS2 classic. Still playable on modern consoles, it'll make you long for a sequel.
Frontlines: Fuels of War was the precursor to THQ's ill-fated Homefront series, and by most accounts delivered the better experience.
James at HPP writes: "Swapping out a nuclear Washington DC for a rechristened Las Vegas known as New Vegas, this Obsidian Entertainment-developed sequel propels the hallmarks of Fallout 3 to greater heights, thus becoming the ultimate progenitor."