Planet TD

Planet TD is a tower defense game about protecting a peaceful solar system from robots sent by an advanced civilization. You defend four planets and their varied terrain, placing towers strategically, managing resources and choosing upgrades to free your civilization from the invaders.

Planets and enemies

The battle spans snowy glaciers, deserts and arid lands, green regions and mountains. You face 25 kinds of enemies, including drones, tanks, biorobotic enemies and other ground and air vehicles.

Towers and upgrades

You can build six types of towers. Each has different upgrade options and can reach three levels during a game; enhancement options also depend on the level. Tower placement and upgrade choices shape your defenses, and different strategies offer replayability.

Each tower starts at rarity level 1 and can gain rarity through in-game experience. Towers come in blue, green, red and yellow, with strength increasing from blue to green. When you build a tower, its rarity level affects which color it receives: higher rarity increases the chance of getting a yellow tower.

Tower economy

Yellow towers can be sold for more than their purchase price. You can decide whether to sell one to strengthen your economy and build more towers, or keep the stronger tower for your defense.