Slack Off Survivor(SOS) is a two-player collaborative casual TD game with rich gameplay and multiple modes for you to explore. Download now to get all the legendary heroes for free! More online benefits waiting for you to receive ~ The sun suddenly disappeared, the whole continent fell into a ice century, zombies from the ground recovered and swept the earth. The world is in despair, and the key to saving the world is a small penguin and two lords with special abilities. In the face of the huge zombie army, you need to find your best partner, unite and collaborate, so that you can save the continent from eternal cold. Best Icy Partner! Team up with your best friends and fight in pairs! Randomized matching with the global lords to defense your towers! Super Cool Roguelike Gaming Single mode with infinite roguelike stages! Using strategy to pass the stages, reasonable collocation position and easy to win! Infinite Synthesis Hero build-up, one-touch to soar! Summoning and s...