1. Fight him over the games and let him justify to himself and all his friends why he left you.
2. Let it go, no reaction. And have him feel like a d-bag and maybe regret what he did.
I get it, you feel hurt and betrayed and you want him to feel some pain. If you REALLY want him to hurt, don't react. Because his shame and guilt over how he handled himself will eat him alive.
Remember, its MUCH easier for him to walk away from you when you are angry and spitting venom.
It MUCH harder for him to walk away from someone carrying themself with class and dignity.
It's your call, Sparks. I just don't want to see you hurting a week from now because you lobbed a grenade into your sitch.
Hold off for now. Let your emotions calm down.
If you still feel this way after a few days, then go after him and get your games and money.