Christians should not play video games at all. They are evil, sent to earth by Devil herself to enslave young minds and lead them to the path of sin and sodomy.
Jesus rejected videogames, same as he rejected electricity, public transportation, vaccination and homoerotic poetry.
Christians of all ages should shun videogames, television and satellite radio, and instead dedicate their lives to bible study and learning proper grammar, flogging themselves ten times for each incorrect usage of your, there, their, then, than and literally.
If you have already sinned, my brethren at the Church of the Fallen Madonna with the Big Boobies will cleanse you of your sin.
Buy yourself some holy water, we take cash, check or money order..
And if you really need to play videogames, I recommend Lollipop Chainsaw...