Trebuchet Trajectory is a counterweight siege physics puzzle. Your goal is to hit the red target with a launched projectile by choosing the right combination of power (counterweight setting) and launch angle. The projectile follows a realistic parabolic arc affected by gravity (9.81 m/s²), and later levels introduce obstacles — walls and barriers that block the projectile's flight path.
Controls: Drag the Power slider to set counterweight velocity, and the Angle slider to set the launch elevation. A dotted preview trajectory appears so you can fine-tune before firing. Press 🚀 Launch (or Spacebar/Enter) to fire. Use ◀ Prev / ▶ Next to navigate levels, and ↻ Reset to clear dials. On desktop, arrow keys also work: Left/Right for power, Up/Down for angle.
Yes! Trebuchet Trajectory is completely free to play in your browser with no download or sign-up required.
Absolutely. The game is fully optimized for touch controls — drag the sliders and tap the buttons on any phone or tablet.
There are 30 verified-unique physics puzzles across 6 tiers of increasing difficulty. Each level has exactly one valid power+angle combination that hits the target.
Yes — solved levels are saved to your browser's local storage and shown as green checkmarks in the level grid.