PlanetsCentral

"One Ally" games can be implemented, there's at least two implementations of the concept (the older and proven POneAlly, and my cmlimit).

--Stefan

Just my two cents, but to prevent me from trading with anybody besides my ally these implementations MUST include a limitation for "give" commands to that ally too. Though there is still no way to prevent non aggression pacts for sure - in my case this would even include no-diplo-games, and to some extent always-war-games (strictly according to the rules - that goes without saying).