Just a question about which of theese games should i get =)

It's hard to say what is better as all of them have their positives and negatives. Risk of rain is very fun and very difficult and is great to play with friends. Spelunky, for me, was very fun for a while, then it got boring. I don't know why, it just did for me :/ I have never played super meatboy, but i have played similar and i think these types of games are more frustrating than hard. and rouge legacy is a great single player game. with many new game +'s and a ton of things to upgrade and get.

I would recommend Super Meat Boy or Rogue Legacy because SMB is really difficult but manages to make you keep playing it, and although I havent played Rogue Legacy Ive heard nothing but good things about it.

I'd say get Super Meat Boy, I've tried Rogue Legacy, the Risk of Rain demo and the original Spelunky (which is free), but the one that I found the most fun and challenging has got to be SMB. I've clocked over 100 well spent hours on it so far and it's just plain amazing with a controller. But if you don't have a controller, I'd recommend trying out demos and deciding yourself which game's gameplay suits you the best.

Super Meat Boy!