There was a demo mode which would run the game on its own and also a mute button. Tandy's version used a blue case while Actronics used a brown case. The player gained victory after destroying 15 convoys (150 invaders) or earns 2,000 points and the player lost if all fortresses are destroyed or one of the invaders lands. Every 1,000 points earned the player a bonus fortress. The game used four C batteries or could be played using an AC adapter. Retail price was $39.95.  1984 saw the introduction of the Tandy "Cosmic 3000 Fire Away" game. Like the first two games, this was a licensed product from Gakken and thus it used the same basic styling as its fore bearers. Gakken marketed their game as "Galaxy Invader 2000". The tiers were reduced to six and included the missile station, a "barrier", and four invader zones. The points were also changed so that, tier depending, the player could earn 100, 200, or 300 points depending on where he or she hit the invader. Gone was the UFO. The player could only have 1 missile in flight on the board at one time but there were barriers which were destroyed when hit by invader bombs (much like Space Invaders) and these barriers would renew once a wave of invaders was destroyed. Unlike "Space Invaders", the player's missiles did not destroy the barrier. There were only two difficulty modes rather than three. To win, the player needed to achieve 10,000 points (which the game could display). The player lost when all three missile stations were destroyed. Unlike the previous games, the player did not lose when the invader reached the bottom of the screen. Akin to the popular arcade game Galaga, the invader would reappear at the top of the game screen and continue to attack. The game required four C batteries but could also use an AC adapter. Retail price was $39.95. Tandy let the line languish for several years when, in 1989, they introduced "LCD Fire Away". The big change was the replacement of the LED for a LCD. The game was also smaller and used a similar control layout as "Cosmic 2000 Fire Away" did. It also had a much lower price point, retailing for $12.95. Due to the reduced power needs, "LCD Fire Away" was able to use watch batteries rather than AA or C batteries. Tandy/Radio Shack would repackage the same game as "Invasion Force" and later, in 1990, as "Jet Fighter".