You need spiritual direction for scrupulosity ... before you tear yourself to pieces.
This is good advice,. I would say however that what you need even more fundamentally (as I and others have mentioned in previous threads) is to study the basic Catechism. The Catechism of St Pius X for instance. I said this in another thread as well, but "venial grave matter" does not exist. The difference between venial and mortal sin is quite explicit, as are the 9 ways of being accessory to sin. I strongly recommend that, rather then deciding which video game is permissible, you sell your video game machine and pick up a good catechism. That way, you are not only avoiding any potentially immoral material, but using your time prudently and performing a meritorious work.
Also, you should not ask about matters of conscience on an internet forum if at all possible. Pre-1958 Catholic manuals will guide you very well, and for more complex questions, SUBJECT YOURSELF TO YOUR CONFESSOR. God bless you