Combat

1-5: Tank levels. Levels 3 and 5 are "straight missile" levels where the players' projectiles simply fly forward. On the "guided missile" levels (1, 2, 4), the projectiles can be controlled with a joystick after firing.

6-9: "Tank-pong" levels, where the players' missiles bounce off walls. In the "billiard hit" levels (8 and 9), there's an additional rule that a missile must bounce at least once before it can hit the enemy tank.

10 and 11: Invisible tank levels, where the tanks only become briefly visible when they shoot, bump into a wall, or are hit by a missile. Both of these give the players guided missiles.

12-14: Invisible "tank-pong" levels. Levels 13 and 14 use the "billiard hit" rule.

15-20: Biplane levels, where the players fly planes that are constantly moving forward and wrap around to the other side when they fly off the screen. Levels 15 and 19 use guided missiles; 16 and 20 use straight missiles; on 17 and 18, the players use rapid-fire machine guns. Additionally, level 19 is a "2 vs. 2" level - both players have two planes each that move and shoot together - and level 20 is "1 vs. 3", where one player has three planes while the other has a single large plane.

21-27: Jet fighter levels. The jet planes move faster than biplanes, but other than that gameplay remains similar. Levels 22, 24, and 27 are straight missile levels, the rest are guided-missile levels. Additionally, 25 and 27 are "2 vs. 2" levels, while 26 is a "1 vs. 3" level.