

Cassette 50 is a compilation of 50 games that was released for a variety of 8-bit home computers, albeit with different selections of games on different computers. The majority of games within the collection were programmed in BASIC and are widely considered to be of poor quality.

Shooter / Puzzle / Arcade / Action / Science fiction
Shoot aliens as they move across the screen. Shoot the spaceship for extra points. Choose one of three games. Space Fever is a 1979 arcade game by Nintendo R&D2. Some sources claim that Ikegami Tsushinki also did design work on Space Fever. It was released in both monochrome and color versions. The gameplay is similar to Space Invaders, which had been released by Taito in 1978. It was distributed by Far East Video. The gameplay of Space Fever is reminiscent of Space Invaders (1978), where the player controls a laser cannon situated at the bottom of the screen and must defeat waves of enemy aliens. The aliens are arranged in rows and slowly move to the edge of the screen, before descending and continuing in the opposite direction. As more aliens are defeated, they increase in speed. A UFO will occasionally appear towards the top of the screen, which can be shot down for bonus points. There are three game modes that change the way the aliens move; the first presents two formations of enemies that move in opposite directions, the second continuously adds additional rows of aliens, and the third is functionally identical to Space Invaders.

Shooter / Puzzle / Arcade / Science fiction
A special version of Space Fever called SF-Hisplitter was released the same year and features aliens that are double the width of the standard variety, which can either be destroyed completely or split into two smaller aliens depending on where they are shot. This version is in color, and the shelter blocks are visually distinct from the monochrome version.

Shooter / Puzzle / Indie / Action / Science fiction
In this vertical scrolling spaceship shooter, you control a ship that can change its polarity at will. As blue/white, the ship can easily destroy red/black enemies, and vice versa. Bullets of your polarity can be collected to fuel your energy gauge, but those opposite will kill you. Destroying an enemy ship causes them to fire revenge bullets which can be absorbed and fired back by the player. Different difficulties exist to change exactly how you interact with polarized points, or how they appear. It is the spiritual successor to Radiant Silvergun, featuring similar level and boss design, as well as it's buddhism inspired themes and aesthetics. Both are directed by Hiroshi Iuchi, who also composed Ikaruga's soundtrack.

Shooter / Puzzle / Arcade / Action / Science fiction
High-speed action-packed game play returns with the addition of exciting head-to-head battle modes, a challenging new time attack mode, and expanded game play progression that goes beyond Fever Time to SUPER FEVER TIME! Space Invaders Extreme 2 - faster and more exhilarating than ever before!


Shooter / Platform / Puzzle / Action / Fantasy
Can you reclaim your ancestors’ land? Evil forces have taken over the once fertile land of Fortiana. You are the only one who can storm the castles and claw it back from the hordes of dragons. Experience a new type of strategy and arcade game. Fence off parts of the battlefield to corner your enemies. Collect catapults and power-ups to besiege the fortresses and take on dragons. But beware! As you progress through the levels it gets harder and harder. The fortresses become much larger and the monsters more vicious. Can you emerge victorious and reclaim the land of your ancestors? You are knight Fortix, the sole hope for the desolate and tortured land of Fortiana to become the fertile land that it was before.