Siege

Siege is a 3D abstract strategy board game designed for calm, focused play.

Place cubes on a grid, stack them with gravity, and capture your opponent's pieces by surrounding them on all four sides. Captured cubes are removed from the board — pieces above fall down, triggering cascading chain reactions. Every exterior face of your cubes scores points, including ground-level faces. The player with the most points wins.

Like Go in three dimensions.

FEATURES

• 3D board with gravity — cubes fall and stack naturally in three dimensions
• Capture by surrounding — block all 4 lateral sides to remove a piece, triggering gravity and cascading captures
• Go-inspired rules — no-suicide and superko prevent infinite loops and add depth
• 3 grid sizes — 3x3 (quick, 5 min), 4x4 (standard, 15 min), 5x5 (deep, 25 min)
• 3 AI difficulty levels — from casual to expert
• Online multiplayer — invite a friend or play via automatic matchmaking
• Optional Line Bonus — score extra points for completing full lines
• 26 languages — English, Spanish, French, German, Japanese, Chinese, Arabic, Hindi, and 18 more
• Ambient music and clean visuals — designed as an escape from the noise

NO ADS. NO ACCOUNTS.

Simple rules you can learn in 30 seconds, but with surprising strategic depth. Every move matters, and every move deserves a moment of thought.

Play locally against the AI, pass-and-play with a friend, or play online — invite a friend or jump into automatic matchmaking.

Designed as a physical board game 10 years ago. Finally brought to life in 3D.

Recent changes:
Siege is a 3D abstract strategy game. Place cubes, stack with gravity, and capture by surrounding — like Go in three dimensions. Play solo against AI, challenge friends locally, or compete online with ELO matchmaking. Solve the daily puzzle, track your stats, and climb the leaderboard. No ads, no accounts, no tracking.