Tower Siege: Turn-Based Artillery Game Online

About Tower Siege

Artillery games are among the oldest ideas in computer gaming: two guns, a hill between them, and a guess at the angle and power needed to drop a shell on the other side. The genre has been remade on almost every platform since the 1970s, usually with tanks. Tower Siege is a clean two player version of that formula with stone towers in place of tanks.

The map is generated fresh for each match, with rolling hills and a ridge in the middle to shoot over. Each tower has 100 hit points. A shell that lands right on a tower takes 46, and the damage falls away the further from the tower it bursts, down to a few points at the edge of the blast. Three accurate hits win the duel. Every impact also blows a crater in the terrain, and a tower will sink as the ground beneath it is dug away, so the line of fire that worked a moment ago may not work again.

Wind is the other variable. It is shown at the start of each turn, pushes the shell sideways for its whole flight and is rerolled as soon as the turn passes. Who shoots first is decided by a coin flip, since the opening shot is an advantage. Turns have a 40 second limit and a match lasts about five minutes. It suits players who like slow, exact games and the satisfaction of correcting a near miss.

How to play Tower Siege

1. Goal: reduce the enemy tower from 100 hit points to zero before yours is destroyed.
2. Players take turns firing one shell each. A coin flip decides who goes first, and each turn has a 40 second limit.
3. Drag on the field to set your aim. The left and right arrows fine-tune the angle and the up and down arrows adjust power.
4. Check the wind indicator before you fire. Wind pushes the shell sideways for the whole flight and changes every turn.
5. Press Space to fire. The shell follows an arc under gravity and explodes when it hits the ground or a tower.
6. A blast damages any tower inside its radius, up to 46 for a direct hit and less toward the edge. Your own tower can be hit by your own shell.
7. Each explosion leaves a crater, and towers settle lower as the ground under them is removed. A shell that leaves the map does nothing.
8. The first tower to reach zero loses. If one shell destroys both towers, the player who fired it loses.

Rules checked against the game on 2026-09-01.

Tower Siege tips and strategy

• Change one thing at a time. If a shot lands short, keep the angle and add power, or keep the power and adjust the angle, so you learn from each miss.
• Your angle and power are remembered from your last shot. Use them as a baseline and correct only for how the wind has moved.
• Fire high arcs over the central ridge. A flat shot is quicker to line up but is far more likely to bury itself in the hill.
• A strong headwind shortens your shot and a tailwind lengthens it. Steep, slow lobs stay in the air longer and are pushed around the most.
• Near misses still count. A shell landing beside the tower does partial damage and lowers the ground around it, which can open up your next shot.
• Never fire at minimum power with a steep angle against the wind. The shell can come back down on your own tower.