Mass Effect 2 is a better game than the original Mass Effect. Plain and simple. The combat is better, the side missions are much better, and this is arguably the most polished and relatively bug-free game that BioWare has ever produced. Little nitpicks and problems with the first game are long gone, and what you are left with is amazingly fun gameplay and a spectacular story with great characters and a complex and rich galaxy to explore. This is one of the best games on the Xbox 360.