I'm going to talk to two girls at once and bring one to my game without telling the other
You're being sneaky, why would you talk with two girls at once?
I want to get to know them to see which one is better.
It is important in a relationship to be honest if you don't want to be exclusive, you should let the other people know. That way they won't get hurt and hurt you.
They are just trash.
I do not think it is nice to call them trash specially if you are trying to actively date them. I would recommend you stop dating them at the same time and just pick someone that you may want to get a relationship with so that you can focus your energy and resources to that person. Dating two people at once can be considered cheating and I do not think you want to be called a cheater once they found out.