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Stack by Stack

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About Stack by Stack

Stack by Stack is a tower defense game in which you protect your base’s power core from cunning robots, with the fate of the world also at stake. In Adventure mode, you play through 25 hand-crafted levels, unlock designs and machines, and combine designs to create more powerful things.

Build and upgrade defenses

You recycle parts from enemy robots into metal and use the metal to build towers. Discover new parts through 3D Printers to upgrade your towers. You also manage your base by building, repairing, rebuilding and upgrading towers and items.

Gather resources

Drill for ores and smelt them into metals to supplement the metal recovered from robot parts. Virtually everything in the game can be carried in a stack in your hands.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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