A bible quiz game is fairly innocent and harmless as for that RTS, it is basically incitment to hatred. Radical Islamists have made similar games before.
Despite the fact that there are no video game censorship laws in Ireland, a game that contains religious violence game would be illegal here because it involves one sect of a religion killing or converting another (okay it blatantly involves Protestants killing Catholics). Can you imagine the uproar if they tried to release it here.