can't go wrong with a free copy of cod 4, good thing you didn't have to pay for it cause cod 5 is just around the corner, BUT cod 4 just might be a little better then cod 5 in certain ways
HALO 3 is a must for online multiplayer
GTA 4 is pretty good for single player
Gears of War 2 is coming out soon, and should be great for multiplayer
there's a lot of good games, but it all depends on your personal taste, so I'd get a blockbuster monthly game pass, and just keep trying out all the older games that you haven't got to play that you might wanna try out, if you can.
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