FREE: Super Sanctum TD [Steam Gift]

The listing, Super Sanctum TD [Steam Gift] has ended.

Super Sanctum TD is a retro-styled Tower Defense game that focuses on strategy, customization and replayability. Build advanced mazes and construct powerful towers to prevent alien hordes from reaching the Core! When the aliens swarm your maze and everything seems lost, use active abilities like Air Strike and Freeze to tilt the battlefield to your advantage!

Strategy and skill are leading principles of Super Sanctum TD. Carefully choose your loadout of towers and active abilities before each level to make sure you can handle everything that will be thrown at you. Each battle is rewarded depending on your performance, and you can use these rewards to gain access to Perks that let you tweak and specialize your strategies even more!

More info: http://store.steampowered.com/app/235250/
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Get amazon gift cards and steam games just for play flash games ;D http://www.tremorgames.com/?ref=4043
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This game works on mac too! Also includes steam trading cards

Good Luck!