What game should I buy?

I am thinking about these games: Brink, Red faction Armageddon, Duke Nukem, Hunted demons forge, Portal 2, Crysis 2, or Mortal Kombat or any other game you think is worth buying. My birthday is this monday and need a new game to play all my other ones are old and boring and i havent gotten a new game since fall out new vegas so I have a wide range to pick from. I would rather not wait a month for a game to come out so please don't suggest gears of war 3 or elder scrolls V or even Dead island try to keep it in early June. Thanks for the help!