''Gaiares''[[note]]pronounced "guy-are-us," as a promotional T-shirt explained[[/note]] is a HorizontalScrollingShooter by Creator/TelenetJapan for the SegaGenesis, released in 1990.

In the year 3000, the Earth has become a toxic dump ravaged by careless humans, leaving an uninhabitable, polluted wasteland. The space pirates Gulfer, led by the evil Queen ZZ Badnusty, plan to harvest the pollution to create weapons of mass destruction. The United Star Cluster of Leezaluth sent a warning to the Earth about their plans, stating that if they could not stop them, they would be forced to supernova Earth's sun to do so themselves; but if they succeeded, Leezaluth would give them a new world to migrate to. Dan Dare (Diaz in the Japanese original), a young pilot from Earth was chosen to be the pilot of a new fighter ship to combat the Gulfer. The ship is armed with a powerful experimental weapon from Leezaluth called the TOZ System, which would be operated by Alexis, the emissary from Leezaluth.

Most horizontal shooters require the player's ship to come in contact with a capsule to gain weapons. Gaiares design was different, and featured one of the most original and unique weapon power-up system in the shooters genre to date. The TOZ System device can be fired out like the R-Type capsule, except each time it comes in contact with the enemy, it would [[MegaManning inherit and learn that weapon]]; repeatedly the player can steal from the same enemy until the weapon is maxed-out in strength. In total there are 18 weapons to be captured and the appearance of each weapon varies depending on the strength meter.
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!!'''Tropes used for this game:'''
* AppliedPhlebotinum: The TOZ System, which is able to [[MegaManning steal the weapons of enemies]].
* AsteroidThicket: The first part of the first stage.
* AttackDrone: The TOZ System. Not only does it help you get new weapons, it also fires out the weapon you have AND it blocks shots!
* AttackItsWeakPoint: The bosses are pretty much all like this. As well as some of the regular mooks.
** The first boss, a mechanical angel, was weak in the chest area. Hitting the head did no damage to it.
** The second boss, a mermaid robot, was weak in the head.
** The third boss, a giant GrimReaper, was also weak in the head.
** The fifth boss, a mechanical dragon, was immune to damage in the head area- you had to shoot its chest when the arms weren't blocking it.
** The sixth boss, a HumongousMecha female gladiator, could be damaged anywhere in the head of the body... as long as her shield was down for a second.
* BossRush: TWO of them- the sixth level has you go through a MiniBoss rush, while the seventh level pits you against the bosses of the first 6 levels.
* ChainReactionDestruction: Pretty much everything goes down in that manner.
* DiscOneNuke: The G-Beam can be fully powered up by the first MiniBoss. Once the three ships connect together, use the TOZ system on it three times to obtain the fully-powered up G-Beam...
** The Tektite Blaster (T-Braster) can consistently be obtained even earlier in the same stage, allowing you to easily breeze through the stage. Unfortunately, it has to be reobtained on each stage (as do other Secret Weapons).
* GravitySucks: The first part of the third stage had black holes which sucked both the player and enemies inside.
* GrimReaper: The third boss was a giant version who teleported around and shot [[SinisterScythe scythe blades]] at the player.
* HailfirePeaks: The fifth stage has the player travel between icy planet and the surface of a star.
** The first stage had the player go through an AsteroidThicket followed by a FloatingContinent.
** The second stage was the descent to a snowy, mountainous landscape, before going into an underwater cave.
** The third stage took you through a nebula with black holes, before the player entered a TempleOfDoom.
** The fourth stage had the player travel through a field of space debris, a destroyed space station, then an [[WombLevel organic cave]].
* HomingProjectile: The homing laser weapon.
* HumongousMecha: All of the bosses, except the fourth (an organic thing) and arguably the third (a GrimReaper).
* MacrossMissileMassacre: The missile weapon when fully powered up. Although it wasn't homing, and was more like a damaging SpreadShot.
* MegaManning: The TOZ System is able to attach itself to mooks, and inherit their weapon so that both the TOZ and ([[GameBreaker usually]]) the player's ship can use them.
* NintendoHard: Even for a shoot-em-up, this game is pretty brutal.
* PowerUp: Only two kinds- one of which [[SmartBomb kills all enemies on the screen]], the other gives the player DeflectorShields which last four hits.
* OurDragonsAreDifferent: The second MiniBoss is a serpentine dragon, while the fifth boss is a mechanical winged dragon.
* OurMermaidsAreDifferent: The second boss is a giant clam shell that opens up to reveal a HumongousMecha mermaid once it takes enough damage.
* ReflectingLaser: The second stage has satellite mooks which reflect lasers shot out by two giant cannons on the planet's surface.
* ReverseShrapnel: The shield weapon, which unfortunately does NOT block shots.
* {{Roboteching}}. The homing laser weapon.
* SceneryPorn: This game has some pretty elaborate backgrounds.
* SegmentedSerpent: The second MiniBoss is a serpentine dragon, while the fourth stage contains mechanical worm enemies that fire out homing balls. Naturally, aim for the head.
* SelectiveGravity: The third stage had multiple black holes which only sucked in the player, mooks, and enemy shots. Your shots were unaffected by the gravity.
* SpaceZone: The first stage, as well as the first part of the third, fourth, fifth and sixth stages.
* SpreadShot: One of the various weapons you could obtain was this.
* TempleOfDoom: The second half of the third stage, complete with SpikeBallsOfDoom, spear traps, crushing walls, fire-spitting statue heads and even GUILLOTINES! Unsurprisingly, the boss was a GrimReaper...
* UnderwaterBossBattle: The second boss. Interestingly enough, you are not underwater when you fight her again during the BossRush.
* WaveMotionGun: The G-Beam. Unsurprisingly, it's the strongest weapon in the game and can go through terrain.
* WingedHumanoid: The first boss is a HumongousMecha angel.
* YouGottaHaveBlueHair
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