If playing a role-playing game could send you to Hell, grace wouldn't be cheap, it would be worthless.
God grace trumps games. If it had an equivalent in rock-paper-scissors, it would never lose.
If you feel that God is leading you to not play the game again, then don't. But your salvation doesn't depend on it. God's grip on us never loosens. If ours seems to be slipping, His remains firm.
Be at peace.