Interestingly enough, there is a reasonably successful D20 system role playing game set in the biblical era. The game is called Testament.
Here is the pitch from the Paizo site: “The world of the Bible comes to life in this campaign setting for the d20 System. Play a wandering Babylonian magus, a sorcerer in the service of Pharaoh, a Canaanite maker of idols, or a prophet of the God of Israel. Walk the streets of ancient Jerusalem, stand beside King David as one of his Mighty Men, smite Philistines, ponder the mysteries of gargantuan tombs, look upon the dwellings of the gods, and battle demons, dragons, plagues, and the legendary beasts of Babylon.”
I find this idea interesting, but I think back to the days when some religious folks were up and arms against D&D. I wonder if such folks would be for this game or consider it an even worse blasphemy than D&D. In any case, it would make for some interesting play:
Rothgar: “Okay, I’ll do the main fighting and keep the monsters off the Babylonian Magnus. The Mighty Men will back me up. Jesus, you’re on healing duty. Also, be ready to raise anyone who dies.”
Jesus: “Just once I’d like to be up front, kicking some ass. You know, I’m the son of God. I bet I can put down some major whup ass.”
Rothgar: “We’ve had this talk before, Jesus. You’ve got a robe and sandals. That makes you AC 10. The monsters will almost always hit you. Plus, you just have a staff. That does like 1D6. It isn’t even magical. Riding that donkey doesn’t help, either. After all, you have no mounted combat feats. I won’t even mention how you blew all your skill points on Craft: carpentry and Profession: carpenter. I mean, how about some points in Listen or Spot? Yeah, I know you don’t need any ranks in swim, what with that water walking. But until you get some armor and at least a heavy mace, you’ll have to just stay back there and patch us up after the battle.”
Jesus: “You know I can’t buy armor and weapons. I give all my gold pieces from the loot to the poor.”
Rothgar: “Yeah, and whose fault is that, Jesus?”
Jesus: “Grumble.”
Rothgar: “Judas, you guard Jesus and don’t let anyone get to him.”
Judas: “Sure thing. But, can we talk about the division of treasure? I think I’m 30 silver pieces short.”
Rothgar: “Damnit Judas, here is three gold pieces. Now shut up and keep Jesus alive.”