hey i have played crysis 2 for almost 2 years but i did not have it on origin can i still be on the open beta for that or do i need to have crysis (1 or 2) to play open beta couse i cant see it in my game tab and i have tried to refresh and change the options so i should be able to test betas can you help me?

You will see the game in-time in your list. The beta will start on the 29th of January, probably it will be available for pre/full download a day before or on the start day, this depends on your timezone.
And no, you don't need any previous games from the series, it's a stand-alone game.