No major studio will put in religion unless they are trying to make it look bad or it has some historical importance. Dragon age had a lot of fictional religion based on Christianity. It didn't portray that religion in a positive light at all. And it received a lot of acknowledgement for gay relationships in the game. Bioware games seem to have a lot of social issues pot shots crammed into their games. Religion in games is no where near as obnoxious as fps developers and gamers talking about gun control.