Bioshock 1+2: Very good FPS games on their own merits. Plus the Plasmids do a great job of connecting you to Rapture.
Mass Effect 1+2: One word that sums it up: EPIC. If you love RPG's, you will adore this. Stunningly large universe, open ended story, and the most beautiful art design I have ever seen.
Fallout 3: Again. Love RPGs? You will adore this. If not, consider this a good stepping stone into RPG games.
Halo 1-Reach: The games that started it all. Get Reach first, and if you really REALLY liked it, get the other three and a half games. You can find a lot of them for dirt cheap these days. Especially ODST.
Assassin's Creed II: If you played the first one before, you know how god-awfully annoying it got. Well, ACII removes it, and excels beyond the predecessor in every way possible.
Modern Warfare 1. Kicks the shit out of Modern Warfare 2 any day.
Mass Effect 1+2: One word that sums it up: EPIC. If you love RPG's, you will adore this. Stunningly large universe, open ended story, and the most beautiful art design I have ever seen.
Fallout 3: Again. Love RPGs? You will adore this. If not, consider this a good stepping stone into RPG games.
Halo 1-Reach: The games that started it all. Get Reach first, and if you really REALLY liked it, get the other three and a half games. You can find a lot of them for dirt cheap these days. Especially ODST.
Assassin's Creed II: If you played the first one before, you know how god-awfully annoying it got. Well, ACII removes it, and excels beyond the predecessor in every way possible.
Modern Warfare 1. Kicks the shit out of Modern Warfare 2 any day.