Tower Defense Meets
Mathematical Precision
A tower fires when a monster's remaining HP exceeds its damage. Chain your Fibonacci towers to drain every monster to exactly zero — no overkill, no waste.
Soon
How to Play →
One Rule. Infinite Strategy.
Exact Kill Only
A tower fires when the monster's remaining HP exceeds its damage — it won't overkill. Arrange your towers so their total exactly matches each enemy's HP.
Fibonacci Damage
Each tower tier deals damage from the Fibonacci sequence: 1, 2, 3, 5, 8, 13, 21, 34. Eight tiers. Infinite strategy.
Always Solvable
Zeckendorf's theorem guarantees every HP value has a unique Fibonacci representation. A solution always exists — if you can find it.
See It in Action
Real screenshots from the game.
Gameplay Videos
Seven Worlds to Defend
Each theme brings entirely new towers, creeps, and boss encounters.
Ancient towers defend a magical realm against creatures from beyond the veil.
Explore →High-tech turrets repel waves of alien invaders across a distant colony world.
Explore →Tactical defense installations hold the line against armored enemy assault.
Explore →8-bit nostalgia meets mathematical precision in a pixelated battlefield.
Explore →Cannon towers guard the harbor against sea monsters and rival buccaneers.
Explore →Victorian clockwork machinery powered by steam and Fibonacci ingenuity.
Explore →Survive the endless dark. The undead don't stop — neither can you.
Explore →Start Free. Go Further.
Start Playing Now — Free
- ✓ Fantasy & Sci-Fi themes
- ✓ 20-wave Classic mode
- ✓ Relaxed difficulty
- ✓ No time gates. No pay-to-win.
Unlock Everything
- ✦ All 7 themes
- ✦ Endless mode + Boss encounters
- ✦ Normal, Hard & Expert difficulties
- ✦ One-time purchase. Forever yours.
Available on the App Store
Download free. Unlock premium with a single one-time purchase.
Coming Soon