Galaxy Invasion Plus
Galaxy Invasion Plus was an update to Galaxy Invasion with a few new features added. An important difference from the older game is the voices. The speech include “Galaxy Invasion” (at the title screen), “Prepare to die, human!” (as the game starts), and “Game over, Player 1” (when the game ends). Other phrases that are used include: “You’re dead!”, “Flagship alert!”, and “Extra ship!” If you achieve a high score, the game says, “Great Score, Player 1”. But if you beat the top score, it says “Super Score, Player 1”. The speech is very clear and one of the best examples of voice in a TRS-80 game.
Big Five Software
The names Big Five Software and Bill Hogue were legendary in the field of TRS-80 games. Bill Hogue and Jeff Konyu created Big Five Software in order to market their TRS-80 games. Two early Big Five Software games, Super Nova and Galaxy Invasion, redefined the way TRS-80 games looked and acted and influenced the games that followed. For many, the final Big Five Software game for the TRS-80 marked the end of the TRS-80 game market.
Weerd
Weerd was written by Arthur Gleckler and released in 1982. It was the final TRS-80 game released by Big Five Software, and only one of two not written by Bill Hogue. Weerd was released near the very end of the TRS-80 game market.
Defense Command
Defense Command was the last TRS-80 game written by Bill Hogue. It was very loosely based by the arcade game Defender, which Williams Electronics released in 1980.
Defense Command has the best and clearest voices of any Big Five Software game. It also has very clever graphics and transitions between different screens. In my opinion, Defense Command is the most impressive of the Big Five Software games for the TRS-80.
Stellar Escort
Stellar Escort was written by Jeff Zinn, and it was the first game distributed by Big Five Software that wasn’t written by Bill Hogue. Stellar Escort has a very distinctive look because of the flashy transition effects when changing screens. There is always something in movement on the screen. Stellar Escort has a number of sound effects, but no music or voices.
Cosmic Fighter
Cosmic Fighter was loosely based on Astro Fighter, which was released by Data East in 1980. In many ways, Cosmic Fighter looks similar to Galaxy Invasion. However, the similarities are superficial and the games are very different. Your goal in Cosmic Fighter is to shoot the aliens as they descend from the top of the screen. Unlike Galaxy Invasion, you have a limited fuel supply which is used up as you move and shoot. A gauge at the top of the screen indicates how much fuel you have left. Your ship can be destroyed either by hitting an alien or shot or by simply running out of fuel. You are not likely to run out of fuel in the earlier levels of the game, but it does becomes an increasing problem in the later levels.
Attack Force
Many people remember the distinctive prelude to Attack Force, which was obviously inspired by the opening to the The Outer Limits television show. The final part of the prelude takes the video screen out of focus and makes a buzzing sound (without any audio amplifier attached). This effect is created by rapidly switching between normal and double-wide video mode, destabilizing the video synchronization on a Model I or III. The Model 4 features a more robust video system and the video just becomes fuzzy. The buzzing sound is created by rapidly toggling the cassette relay.
Galaxy Invasion
Many people thought that Galaxy Invasion was based on Space Invaders (including a reviewer for 80 Microcomputing), but this was a common misconception. Galaxy Invasion was based on the arcade game Galaxian, which was released by Namco in 1979.
