To liberate each city, the player must defeat three 'waves' of enemy FIGHTERS and ROBOPROBES that are often 'shielded' (in red) and who fire lethal zig-zag shaped 'Zizzers' at the player's ship. Enemies who are shielded must be hit several times to weaken the shields before they are destroyed. Also there are three types of MOBOIDS to destroy, their features are as follows..

	Green Moboids..	'Spin' player's ship on contact and 'bounce' enemy ships
	Blue Moboids..	'Bounce' all ships
	Red Moboids..	Destroy all 'unshielded' ships (including Player's ship)

After defeating the three waves of attack, the alien Robot holding the city appears within three concentric rings (a la "Star Castle") through which a 'Slot shot' can be scored 'neutralizing' the Robot and earning the player a Bonus ship and advancing to the next level.
I'm not certain what happens if you don't 'neutralize' the enemy robot before it "escapes".. but I'm sure that you do not score the vital "Bonus ship" though I'm not clear whether you still advance to the next round, though it seems likely.
Having never got past "Faltar" I don't know what happens after you conquer the eighth city.. presumably you start over with increasing difficulty (as in Space Fury).

Speculation

The Zektor brochure promotes the use of a "new" rotary player control used to steer the ship. It also describes the idea of "converting" any upright SPACE FURY and ELIMINATOR games.. which leads to the conclusion that the game appeared before TAC/SCAN and STAR TREK, since they both use the same rotary control. The EPROM numbers for Zektor support this theory.

Apparently the last boss was the alien from Space Fury.

Board Configuration

Controls

1 Player Start, 2 Player Start

Encoder wheel, Thrust, Fire

Downloadables

Zektor Switch Settings
Zektor ROM Images
Zektor ROM Images (without security chip)