PRISM DEFENSE

Draw. Merge. Defend.

You never know which tower comes next. Draw, merge, and see how many waves you can hold.

In three seconds

01
Draw
Spend gold to summon a random tower on a random slot.
02
Merge
Drag two identical towers together for one tier up. Type rerolled.
03
Defend
Stop the enemies looping your track. Every escape costs a life.

Features

The merge gamble
Merging two identical towers makes a stronger one, of a random type, every time. Every merge is a risk-reward decision.
Endless waves
Enemy HP scales exponentially and a boss arrives every fifth wave, paying bonus gold at HP milestones and summoning escorts at half health.
Counter enemies
A healer that restores the pack, a splitter that leaves two children behind, and a shield that blocks hits rather than damage. Each debuts on its own wave.
Set strategies
Point every Laser, Cannon, Frost, Sniper, or Volt at FIRST, STRONG, or HEALER as a group. Cut the healers first, or stop the leader. Your call.
Economy decisions
Draw costs escalate, stuck towers sell for a refund, slots differ in track coverage, and calling the next wave early pays gold that scales with the risk.
Daily challenge
One shared seed for every player in the world, every day. Beat today's record.
Achievements
Wave 10 lands inside an ordinary first run. Wave 30, a tier 7 tower, and finishing without ever selling do not. The ladder reaches below and above.
Palettes
Finished runs and unlocked achievements both pay Prisms. Spend them repainting the board. Graphite nearly drains the colour, leaving you to read the board by shape and position.

5 towers × 7 tiers

Glowing vector polygons. Each rules the track its own way.

Laser
Rapid beams at the front-runner.
Cannon
Slow shells with splash damage.
Frost
Chills the target and nearby enemies, slowing them.
Sniper
Reaches anywhere on the board, for heavy damage.
Volt
Lightning that chains between enemies.

Palettes

Palettes recolour the towers and nothing else. Enemies keep their colours under every set, because colour is how you read a healer, a splitter or a shield. Which is why graphite, drained of hue, separates tower from enemy better than any other — and asks the most of you to tell two towers apart.