The organizer is compatible with Terraforming Mars. The organizer fits: Terraforming Mars base game; Terraforming Mars: Venus Next expansion; Terraforming Mars: Prelude expansion; Terraforming Mars: Colonies expansion; Promo cards; Acrylic overlays for the player boards (up to 5 overlays with the maximum size of 240x180x6 mm each). Additional map from the Terraforming Mars: Hellas & Elysium expansion might be stored on top of the insert but the box lid will not close by the thickness of the game board. The assembly is required and will take about 60 minutes.