I'm not going to give back someone's games that might be theirs
Why wouldn't you give the games back?
Because I want to keep the games for myself.
You shouldn't steal something from someone. It's wrong to steal things from people just because you want it for yourself.
I'm just going to pretend to keep them for myself just to get a reaction.
Why would you be so mean to this person? You should give back what is theres before you get in trouble.