Mass Effect Series Question

Yes. Play them all.

yes you have to play them all

postpone it, you need to know EVERYTHING to fully enjoy this awesome franchise :3 not required, but always strongly recommend

If you are a hardcore RPG player and want to see your own character grow with the story, then yes you should play them in order since choices carry forward to the next game.

Edit: You won't be lost or anything, its a rather generic storyline and not hard to get into though

Alright then. Will hold off on it if the story can be altered with the actions i take in 1 game.