We're happy to announce that you can now earn Steam trading cards in One Tower! There are already many players selling earned cards on the Steam marketplace, go get them!
New to Steam Trading Cards? With Trading Cards you can earn earn badges, level up your account, unlock Steam profile backgrounds, emoticons and more. You can also trade them out or sell them on the Steam marketplace to other Steam users. Learn more here: http://steamcommunity.com/groups/tradingcards