Custom games are scenarios that have been crafted by other players. Here's how you play them: Download a scenario file (.scn) from these forums. Log in to the game, then click Multiplayer. Click Create Custom Game. Click Load... Select the scenario (.scn) file that you want to play. Click Create Game. Enjoy! If you like a particular scenario, or you have suggestions for how it could be improved, be sure to let the author know! Original instructions by Kalin. Thanks Kalin!