Couple of things, one there is no gospel of christ.
two, jesus is not lord he is the son of our lord.
three, an atheist has no beliefs, thus working on your project should not pose a problem.
four, There is no hell, it says in the bible hell is the common grave, not the fire and brimstone you guys usually bash on about.
You say god has spoken to you and given you a mission (blues brothers for the gaming world), this is plain stupid, i very much doubt god has taken time to speak to you. You are in fact in breach of race relation laws by your advertisment, and as such you should pull it.