Will the judges consider a game made by an RPG Maker game that is multiplayer? There are many things that can be done with it that are not within the traditional intended applications.
There's no rule against it, but it will be judged by one person at a time, so the multiplayer aspects may be lost to the judges.
Thanks Tea. They can see the concept of the multi-player aspect, as a single player. That's one reason why I always make 2 entrees for IGMC.