PMC contests are very simple really. They are always in a specific genre such as Skins or maps. Currently there are 2 contests going on. Arctic Creature Skin contest and the Survival Games Arena contest. The rules are simple. The work must be yours, no copying, stealing, etc. Just make the map or skin, enter it, and hope that you win! They are judged by Diamonds. The more diamonds a post gets, the more likely it is to win. There are often prizes such as Steam Games and other things, Hoped this helped