You shouldn't let your kids see you enjoying anything that promotes killing everyone who disagrees with you, being commanded to slaughter and rob innocent people, teaching that jealousy and anger are good, killing entire countries, fighting fire breathing dragons, curing the sick with magic instead of hard work, taking slaves, or oppressing women.
So make absolutely sure that they don't see you reading the bible.
Games though? Explain that they aren't real and have discussions with them about things that they have seen to explain that characters don't always make good decisions. Talk to them about what is bad and have them be able to respond on their own with what they think makes something good or bad. Just be an attentive parent, and fiction is fine.
Presenting a wicked and indefensively evil fictional being as unquestionable good and factual is a problem though.
