I'm going to delete my brother's games when he deleted my stuff
Why are you going to do this?
I do that to him because I'm bored of his games
An eye for an eye makes the whole world go blind. Your brothers, so try and talk it through without confrontation.
I'm going to kick his ass
It is wrong to do something so hurtful. If you have a problem you should talk to him like an adult and try to work it out. If you  delete his games it might end in violent confrontation.