In Specula I wanted to have it so that undead couldn't build units, but instead gained more Zombie units when they wiped out regular units. I thought I'd found a novel solution: Set the wrecked-type of normal units to "Zombie" Set the possible-sides of Zombies to "Undead" only I figured that this would wipe out the created Zombie units for any player but the Undead, so that when the Undead wiped out a bunch of units, poof, they had a bunch of zombies, while when anybody else wiped out a bunch of units, they'd just disappear. Anyone who is familiar with the way wrecked-type works probably isn't in suspense. Instead of only allowing the creation of Zombies for the set side, it gives the warning: Leaving unit on disallowed side This is not fatal, but may cause more serious problems later on. Do you want to continue playing this game? (if 'no', you will get a chance to save it) I think designers would be better served if the code simply vanished any disallowed unit without reporting an error. I can't see much reason for it to work like it does, but maybe I'm missing something. __________________________________ Do you Yahoo!? Yahoo! Domains – Claim yours for only $14.70/year http://smallbusiness.promotions.yahoo.com/offer