This product is fully compatible with all printings/editions of the game.
Terraforming Mars is an incredible game that's tremendous fun, but has player mats that are made of thin, slippery card stock which creates the risk of pieces being easily bumped accidentally.
This product solves this by providing an overlay to hold everything in place. The overlay has bins for the resource cubes and tracks with small notches for the income marker cubes, plus as a bonus also has a long slot in which to store a supply of player cubes for marking hexes or cards. Each income track also has a cube slot to the right of the "10" space to indicate "+10" when income reaches high levels. This slot is rotated 45 degrees to make it easily discernible from other cubes.
Opinions vary on whether there should a divider wall or not between the Energy and Heat resource bins, so now you can have it whichever way you prefer! The overlay comes with a wall there but is built to break off if you prefer to slide your cubes from one bin to another. See the photos and video for more information!
Because of the tight nature of the artwork for the income tracks on the player mats, there is little to no space for material between each numbered square. As a result the overlay tracks are just slightly out of vertical alignment with the player mat, but if you look at the photos and video you can see that it is barely noticeable and will have no impact on appearance or reading what number the marker cube is resting on.
Each overlay measures 8.67 x 6.31 x .125" (220 x 160 x 3mm). A stack of 5 overlays is about .63" (15mm) tall.
No assembly is needed but removal of a paper backing is required.