I'm thinking of dropping out of college even though my sister paid the tuition.
Do you feel like you're letting yourself down, or others?
I've never had the motivation and I've always been a loser. I want to be the winner at something other than video games, but I don't know if college is right for me.
Your sister has already paid for your tuition, so it is wasteful for you to drop out now.  At least give it a chance, and if it isn't right for you, you can drop out next semester.  College can help you find something that you are good at, if you are open to the experience.
I would have to get out of my comfort zone. It scares me.
I know it's scary to do new things, but it's important to get out of your comfort zone sometimes. I think it would be good if you at least gave it a chance, because you might find that your really like it.