Gonna be trying out some creative merchandising at The Game Expo ( #TGX Melbourne ) next month. Offering a discount that'll even make some merch free for folks who play the demo and leave feedback. This poster explains how it all works.
Maybe a little ambitious to sell t-shirts for a game that hasn't released yet, but 1) the design isn't too closely tied to the game, so it stands on its own feet and 2) it's already been selling pretty well.