Explorers of Space

In the first two game modes, Game A (easy) and Game B (difficult), the player must move the spaceship's energy shield to deflect the incoming enemy missiles.

A point is scored for every missle deflected.

A miss is scored when an enemy's missile hits the spaceship. If however the mothership is visible (top left of screen) when a miss occurs then only a half miss is scored. Half misses are shown by a flashing miss mark. Two half misses become 1 full miss. Score 3 full misses and the game is over.

At 200 and 500 points, if there are one or more misses, a fanfare sounds and all misses are cleared.

In Game A attacks are limited to at most 3 enemy ships, but in Game B attacks can come from all 4 enemy ships, which adds to the difficulty.

Elektronika added a third game mode (not included in the original Nintendo game) which reverses the roles of the player and the computer. The player shoots missiles from the enemy ships while the computer controls the landed spaceship's energy shields.

1 point is scored when the player hits the spaceship with a missile. The player has 300 missiles to try and score as many points as possible.

Every 50 missiles used will be displayed as a half miss on the screen. When 3 solid miss marks appear on the screen, all 300 missiles have been fired, and the game ends.