Castle Collapse
Aim, fire and bring your rival’s castle crashing down.
About Castle Collapse
Two castles. Two cannons. One winner. Castle Collapse is a physics siege game: set your angle and power, choose a cannonball or an explosive shell, and watch wood, stone and glass react for real as walls crack, towers topple and TNT goes up.
Your opponent is an AI rival — Ironclaw, Stonewise or Destroyer — each with its own style, from flat, aggressive shots to patient strikes at your foundations. Knock their crown to the ground or bring their castle down before yours falls. Fight through a 1,200-level campaign where castles grow from wooden forts into towering stone citadels, take on quick battles and a new Daily Siege every day, earn coins and upgrade your walls and cannon.
How to play
- 1
Drag anywhere on the battlefield to aim — the direction sets the angle, the length of the drag sets the power.
- 2
Pick a cannonball or an explosive shell, then press Fire.
- 3
Knock your rival’s crown to the ground or bring their castle below 30% to win — before they do it to you.
- 4
Win with fewer shots and a stronger castle to earn up to three stars and more coins for upgrades.
Features
- Real physics: wood, stone and glass crack, topple and shatter in different ways
- Three AI rivals with their own styles: Ironclaw, Stonewise and Destroyer
- A 1,200-level campaign with bigger castles and a boss every 10 levels
- Quick Battle against the rival of your choice and a new Daily Siege every day
- Coins and upgrades for your walls, cannon, explosive shells and aim guide
- Free to play in your browser — no download, no account
Controls
- Aim
- Drag on the battlefield, or use the arrow keys
- Fire
- Fire button, or Space
- Switch weapon
- Tap a weapon card, or press 1 / 2
- Pause
- Pause button, or Esc
Screenshots
Castle Collapse FAQ
Is Castle Collapse free?
Yes. It’s free to play in your browser, with no download and no account.
Is my opponent a real person?
No. Every opponent is a computer-controlled AI rival, and the game always labels it that way.
Does my progress save?
Yes — on the device and browser you play on. Clearing your browser’s site data resets it.
Can I play on my phone?
Yes. Open the game in your phone’s browser and turn it sideways; Full screen gives you the biggest battlefield.
How many levels are there?
1,200 campaign levels, plus Quick Battle and a new Daily Siege every day.
Play in your browser
No download or account — Castle Collapse runs right here, on desktop and mobile.