Battlefield: Bad Company 2
This game is probably a COD killer with the incredible online experience. Haven't even played the sp, but I am completely hooked on the Multiplayer content. 4 different game modes, 4 different class types makes 4 a lot of game play.
Assassin's Creed II
This game is amazing. It is gorgeous. (cities of Rome, Venice, and Florence) I am loving every minute of playing it. Walking around 15th century Florence and enjoying the architecture is great.
This is provides many different types of combat challenges (includes new ability-enhancing plasmids) & various ways to overcome them. Choices that the player makes affect one's abilities later in the game, (customize multiplayer characters) not to mention how characters treat you. Great for adults.
Amnesia: The Dark Descent
Escape from the corridors of a frightening underground castle
Starcraft II Wings of Liberty
A Great real-time strategy game, since Red Alert 2.
Call of Duty: Black Ops
The single player story is absolutely great, but Online gameplay at the moment is really laggy.
Mass Effect 2
The story is fantastic, Commander Shepard's adventures continue in dark seque.
Tom Clancy's Splinter Cell Conviction
Good story, great game, nice graphics and medium-length solo campaign, beautiful multiplayer campaign and good online multiplayer.
Lara Croft and the Guardian of Light
Excellent, stunning visuals, immersive world.
Travel through a massive world battling bizarre creatures and interacting with quirky characters