Defend the base marked with an eagle and destroy every enemy tank in the round. Each tank is worth 100 points. Start the next round from the results panel; there is no final round.

• You start with 9 lives. Remaining lives and points carry over. The base starts each round with 15 health; the game ends if the base is destroyed or you run out of lives.
• Red brick walls can be destroyed. Steel walls block tanks and bullets. Bullets can cross water, but tanks cannot. Green ground is passable.
• Your normal bullets are 50% faster than enemy bullets. When they collide, only the enemy bullet is destroyed; yours continues, with no points awarded. Your shots are absorbed by the base without damaging it, but can still destroy its brick defences. After losing a life, a flashing ring marks a brief period of protection.
• A 🎁 gift remains available for 12 seconds. Rapid fire halves the delay between shots and multiplies bullet speed by 1.85. Each tank can have one bullet on the field at a time. The boost lasts until you lose a life or start a new round; extra gifts do not stack.
• Hold the fire button or Space/Enter to keep firing. Move with the arrow keys or WASD. Pause with P or the Pause button. Switching windows pauses the game automatically; resume manually.
• Later rounds have more enemies, up to 20 per round and 5 on the field at once. There is no automatic save: reloading starts a new game.

Opening the rules pauses an active game. Close them, then press Resume to continue.