You control an insect-like creature called a Yar who must nibble or shoot through a barrier in order to fire its Zorlon Cannon into the breach. The objective is to destroy the evil Qotile, which exists on the other side of the barrier.

The primary objective of the game is to break a path through the shield, and destroy the Qotile with a blast from the Zorlon Cannon. The secondary objective is to Score as many points as possible.

The shield is the red area in front of the Qotile base. It appears in one of two shapes: an arch, or a shifting rectangle.

The shield is made up of cells. The Yar scout can destroy these cells by firing at them with energy missiles, from any location on the playfield, or by devouring them on direct contact. (The Zorlon Cannon can be used to demolish cells, but this is a waste of a powerful weapon.)

Once a path has been cleared through the shield, the Zorlon Cannon must be used to destroy the Qotile. To call up the cannon, the Yar can either eat a cell, or run over the Qotile.

The Zorlon Cannon appears on the left side of the playfield, and moves in a direct line with the Yar. This means the Yar is in its line of fire so it's important to aim the cannon at the Qotile, fire, and fly out of the way fast!

The glittering path down the center of the screen is the Neutral Zone. This area will protect a Yar from Destroyer Missiles, but not from Swirls. While in the Neutral Zone, a Yar cannot fire any energy missiles of his own.

The Yar will move in whatever direction the Joystick is pushed. The screen ‘wraps’ from top to bottom, bottom to top. This means that if you fly the Yar off the top of the screen, it will appear at the bottom, and vice versa.

The red ‘fire’ button has two separate firing functions: it will fire an energy missile in the direction the Yar is pointed, or operate the Zorlon Cannon when it is on the screen.

The red button is also used to restart turns and games. Press it after each turn to start a new ‘life’, or to continue a successful one. Press it at the end of a game if you want to play that same game version again.

GAME 0: This is the simplest version, a good choice for young children to play. It features a slow Destroyer Missile.

GAME 1: This is the two-player version of Game 0.

GAME 2: This is the ‘‘normal’’ game, with two alternating shield configurations, plus a Destroyer Missile, and a Swirl traveling at normal speed.

GAME 3: This is the two-player version of Game 2.

GAME 4: This game features a Zorlon Cannon that bounces off the shield. There are two shield configurations, plus a Destroyer Missile and a Swirl travelling at normal speeds.

GAME 5: This is the two-player version of Game 4.

ULTIMATE YARS features a bouncing Zorlon Cannon, plus some unusual twists that distinguish it from the other Yar games.
GAME 6 & GAME 7: are one & two-player versions of Ultimate Yars.

GAME SELECT SWITCH
Use the GAME SELECT switch to select the game number you wish to play. The game number appears in the center of the screen.

GAME RESET SWITCH
Once you have selected the game number you wish to play, press the GAME RESET switch to start the game. To start the same game over again, you may either press GAME RESET or the red button on your Joystick.

GAME RESET can also be used to start a new game at any time.