Stack by stack is a tower defense game where you stop viciously cunning and diabolical robots from stealing your base’s power core, perhaps even saving the entire world in the process.

Adventure mode
Play through 25 beautifully hand-crafted levels
Unlock new designs and machines to help you against the robot hordes. Combine existing designs to create even greater things.
Collect and modify resources through drilling and smelting collectibles.

Game features:

• Recycle enemy robot parts into metal
  
• Use harvested metal to create towers
  
• Upgrade towers through discovery of new parts via 3D Printers
  
• Manage your base, building, repairing, rebuilding, and upgrading your towers and items
  
• Drill for ores to smelt into metals to supplement metal stolen from deceased robots
  
• Virtually everything in the game can be carried in a stack in your hands