Forgotten Worlds1988

The Gunstar family are the protectors of the planet Gunstar 9. After many years of peace, vicious dictator Colonel Red kidnapped the Gunstar twins’ older brother and used mind control to make him his slave.

The gameplay in Galaga '88 is built on the same premise as that of the original Galaga game, but is in many ways more complex and more difficult. The game is divided into a series of 29 Stages distributed through eight Worlds. The starship Galaga accelerates between Stages and Worlds and even to higher dimensions (go to the section on Dimensional Travel below to find out more). With the exception of the third and eighth, each World culminates in a Challenging Stage. There are six such stages to engage in any full game, and each begins with the on-screen announcement "That's Galactic Dancin'!" and has its own YM2151-generated song to which the enemy formations dance. In any given Challenging Stage, both the design of the enemies and their dancing formations shall vary according to the player's current Dimension. As in Galaga, the objective is to destroy all forty enemies before they fly away off the screen. However, refraining completely from touching any controls for the duration of a Challenging Stage awards a "secret bonus" ranging in value from 10000 to 25000 points, and equal to the "special bonus" which would have been awarded for destroying all forty enemy aliens instead. Galaga '88 introduces a variety of new enemies and behaviors. Most of these special enemies are worth varying amounts of bonus points when destroyed. Some enemies can combine into larger enemies which take multiple hits to destroy, while others arrive in eggs, explode in a shower of fireworks, grow with multiple hits, or sport armor which makes them invincible while in formation. Certain enemies drop small formations of tiny creatures that wiggle their way down the screen, and still others can act as escorts to incoming groups of enemies and then quickly dive at the player before leaving the game. Most stages also include various obstacles which appear once the enemy formation has been assembled. These can be destroyed with either one or several shots, and the first one on each stage will leave a "Warp Capsule". At the start of the game, the player can select how many Galaga starships to start with (one or two), affecting their number of remaining lives. The game ends after the final boss is defeated (or when the player's last ship is destroyed or captured) - in the latter case, the player can continue the game for an additional credit. The Game Over screen shows the player's hit-miss ratio and a visual representation of their progress. If the player reaches Stage 27, the game also shows a picture of the final boss (damaged if defeated, but silhouetted if not). If the arcade operator has set the "continue" option to "on", the player also cannot continue if he is defeated on Stages 27-29.

The planet Sierra is being attacked by Scarlet, a terrorist group lead by a vicious creature named Xi-Tiger who is plotting to destroy the human race. With vengeance, our hero Epsilon-Eagle will fight against Xi-Tiger as well as the terrorist organization that he formerly led.

The peaceful and prosperous solar system Junos was located at the end of the Milky Way. Those who called its five planets home had no idea what was about to happen... Halcyon, ruler of the Fourth Empire, had Junos marked as its final target in the galactic massacre, and had sent the bulk of his attacking force in with a single purpose – the elimination of all life forms in the system, and the construction of a gigantic fortress on each of the five planets from which to rule the galaxy. Galaxy Force II is not a true sequel to the orginal game but a an enhanced version of the original. It was released roughly two months after the release of the first part thus making it obsolete.

Alien Storm is a side-scrolling beat 'em up. The game resembles Golden Axe, with a similar artistic style, three playable characters (a man, a woman, and a novelty character) and pick-up or power-up special attacks. The player (one player only on the Master System version, up to two players on the Mega Drive version, three on the arcade version) selects from the three different characters to embark upon a quest to save the Earth from an alien invasion. All of the Busters are playable from the beginning of the game. There are 6 missions to complete (8 in the Mega Drive version) with several stages, and each mission has the player blasting aliens, from the streets to the mother ship, where the mother of all aliens can be found. This task becomes increasingly difficult with each new mission, and the aliens are capable of hiding inside objects such as plants, postboxes, trashcans, drums, and other items. Each mission has an objective such as rescuing people or destroying an UFO. When dealing with a few aliens, flying heads will appear, which can be shot to collect life or energy. Energy is used specifically to power the energy based attacks of the player's weapon (such as flames or electricity) and to use the much more powerful special weapons. In a similar format as other early Sega arcade games, each character has unlimited usage of various short-range attacks, i.e. punches, kicks. Along with these standard attacks, each character has their own individual weapon (Garth's weapon that shoots lightning is replaced with a flame weapon in the Master System version). Special attacks are also included, and vary depending on the character chosen at the start of the game. For instance, Garth summons an U.S. Air Force starship that drops bombs across the street (in the Master System version he has Karen's special, a ballistic missile strike). Scooter will teleport out of his present location and leave a series of bombs that will blow up on the appearance of aliens, after which he will re-appear (in the Mega Drive version he just explodes, leaving his head, which his new body returns to retrieve). Karen calls down a nuclear missile, which incinerates every foe on the screen. However, a large amount of energy is depleted by using each character's special attack, and cannot be used if the energy of the player's character is too low. There are few bosses in the game. The arcade original only features a single boss that has three distinct forms. The Mega Drive port has two of these forms as two separate bosses. At the end of each mission, the side-scrolling gameplay shifts to either a shooting gallery perspective where the player must take out the aliens that pop out of various locations, similar to the bonus stages of Shinobi and Shadow Dancer, both also by Sega, or a running section that is similar to the side scrolling mode but plays like a horizontal shooter instead with projectile weapons.

A call for help comes from deep in the universe. Fantasyland has been taken over by destructive forces. Quick on the scene is Space Harrier equipped with his laser, who must attempt to outwit and outmanoeuvre the hoards and prevent Fantasyland from being blown into oblivion!

Exerion is a vertical shoot 'em up released by Jaleco in 1983 and licensed to Taito for distribution in the United States. Screenshot from arcade version Exerion is a shoot 'em up game featuring parallax effects and inertia simulation, something notable for 1983. The player travels around strange scenarios shooting aliens. The player has two types of guns: fast single shot (limited) or slow double shot (unlimited). In 1984, along with the MSX1 port of the original, a sequel was released titled Exerion II: Zorni for the MSX1, with similar gameplay to the original. There were plans for an NES release of this game. In 1987, the game was followed by the semi-sequel titled Exerizer, also known as Sky Fox.

Gaplus is a fixed shooter arcade game that was released by Namco in 1984. It was the only other game to run on Namco Phozon hardware, and in the US, a modification kit was later released to change the name to Galaga 3, possibly to increase recognition among fans of the games even though there was no "Galaga 2". Since Gaplus is a sequel to Galaga, it has similar gameplay. The player controls a spaceship, that can now move vertically (limited to halfway up the screen, much like Atari's Centipede) as well as horizontally, and shoots at swarms of incoming insect-like aliens which fly in formation above it and swoop down to attack it in akamikaze-like dive. In this sequel, the level starts over if the player gets killed before all the enemies have come in. When all enemies are killed, the player moves on to the next level. By obtaining certain powerups, it is possible to shoot sixty bullets per screen, the most any Galaxian-related game has.