Landmark is now available on Steam! You can find us on the "Early Access" page of their interface. If you own Landmark already, you do not need to purchase it again. If you like the Steam interface for organizing your games on your PC, then you can choose "ADD A GAME" (in the lower, left corner of their interface), then click "Add a Non-Steam Game" and then add "Landmark Beta" to your Steam Library. Thanks!