Rain World: The Watcher is a DLC expansion of Rain World. Journey beyond to something, somewhere only ever glimpsed. When the world beneath your feet cracks and crumbles, will you hold on to all you once knew? Or dive into the unknown? The wilds that await will be unlike all that's come before. Unknown creatures stalk and climb and dive and hunt. New breeds rip and pluck and burrow and hide. Predator and prey redefined.And through the middle of it all, a lonely lost slugcat trying their best to outlast the ravages of a warped world.

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "LIBRARY" tab and start downloading.