With every game system, and every group, rules get changed. It maybe from a rule that did not work right, or right for the group. Something that you came up with to make the game seem a little more real or equal. For whatever the reason the rules get changed and added onto. When I play with a new group that has a different rule I will question them on the reason why and the details of the new rule. If I like it I may add it into my games. So here are some rules my group has come up with or that people have sent me. Got a new one, e-mail it to me and I will post it.