History VideoGame / ChaosHeat

Interestingly enough, the game managed to spawn a sequel, ''Chaos Break'' (despite ending on a haunting note that couldn't possibly have room for one[[note]]the game actually does have a good ending, which ''Chaos Break'' seems to follow off of, but the means to trigger it is so obscure very few people saw it[[/note]]), which was released in January 2000, but it's in the SurvivalHorror genre instead of an arcade-style shooter.

''Chaos Heat'' is an action game made by Creator/{{Taito}}, following an arcade-style RunAndGun format where your onscreen character(s) runs around shooting at everything until there's nothing else to shoot at, in an open-world format.

Interestingly enough, the game managed to spawn a sequel, ''Chaos Break'' (despite ending on a haunting note that couldn't possibly have room for one[[note]]the game actually does have a good ending, which ''Chaos Break'' seems to follow off of, but the means to trigger it is so obscure very few people saw it[[/note]]), but it's in the SurvivalHorror genre instead of an arcade-style shooter.

* GiantSpider: Several of the mutated monsters starts taking forms of oversized arachnids, from spider-like monstrosities up to your player's waist to being as large as the room they're fought in. The elevator boss battle notably has a KingMook spider animating a corpse to fight as its first phase, before ditching the corpse to continue battling.

* {{Mutant}}: Pretty much ''all'' the enemies the game throws at you. Most of them resembles insects, albeit deformed and twisted to horrifying proportions, while many of them have fused with dead personnel or animals, or are otherwise growing on machines and driven to attack everything in sight.

In a Tokyo biolab, an outbreak from a virus strain have resulted in giant, mutated monstrosities being spawned at an alarming pace, with the lab's personnel slaughtered by the creatures before the entire facility goes into lockdown. To contain the mutation from spreading into the city, it's up to a trio elite commandoes in the DEF, each with their own special abilities executed by holding down the firing button long enough, which the player controls to infiltrate the lab and take on the monsters:

* AndThenJohnWasAZombie: How the game normally ends: [[spoiler:in the final cutscene, after destroying the last mutated monster, your character then boards an evac chopper, having a conversation with a {{redshirt}}. Cue a ReactionShot of the redshirt seeing something horrifying, before cutting back to your character - now a mutant monster yourself, having been infected during your escape]]. Then Roll Credits. A good ending in which this doesn't happen exists, which occurs if you manage to destroy 90% or more of all Chaos Cores spawned by killed enemies.
* AttackOfTheMonsterAppendage: The boss in the laboratory, a set of four gigantic arachnid-like legs suddenly sticking out a grate to attack. You shoot at until it's health is spent, where the legs then retreats back into the hole whence it came.
* BandagedFace: For some reasons unexplained throughout the game, the third playable character, Vogt, have his face entirely obscured by bandages, but not the rest of his body.
* BattleAmongstTheFlames: One area is set near a downed helicopter. And while your character fends off mutants, the heli explodes and sets most of the area alight.

* BrainMonster: One such monster appears in the lab, as a gigantic brain growing out a pool. With neural veins sticking out the water's edges, having two muscular clawed arms capable of slashing at you and a ''single eye'' growing in it's center. It's also one of the longest boss fights since you need to kill it ''three'' times.
* CombatTentacles: On several of the bosses. The "Prototype" notably have one in place of it's left hand which it'll use for whipping at you from a distance, the BrainMonster in the lab have tentacled barbs growing from it's sides in the second and third phase of it's boss fight, while the FinalBoss mutant core have it's last form being a giant pulsating heart with protruding tentacles it will use during battle.
* CrateExpectations: Plenty of craters shows up in various areas, for the player to smash open for points and weapons. Including areas ''unlikely'' to contain crates - while finding them in warehouses and loading bays are expected, you can find crates in an office's conference room...

* ElevatorActionSequence: The second boss. You managed to escape into an elevator and travel up, only for a mutant abomination with spider-legs growing out it's back to drop from the ceiling. Cue a boss fight as the elevator continues going up.
* FacelessEye: How the FinalBoss reveals itself. As the mutant core comes into view, it starts off as a gigantic floating eyeball who spews EyeBeams all over the place. Once it's life is spent though, it's shrinks before assimilating into a [[BishonenLine far more humanoid]] second form.

** The "Prototype" mutant boss have these as well, with a ''tiny'' head hidden inside.
* FlunkyBoss: Most of the bosses can unleash lower-level mutants as backup.
** The giant serpent mutant can sometimes lunge it's head into hitting the ceiling, causing GiantSpider mooks to drop down.
** The giant winged mutant boss, itself a KingMook version of the regular flying mutants, will expectedly dispense it's flying underlings during battle.

* GiantSpider: Several of the mutated monsters starts taking forms of oversized arachnids, from spider-like monstrosities up to your player's waist to being as large as the room they're fought in. The elevator boss battle notably have a KingMook spider animating a corpse to fight as it's first phase, before ditching the corpse to continue battling.
* HellishCopter: Early in the game, you managed to radio in an evac chopper to provide you a lift, only for a bunch of infected monsters suddenly appearing forcing you to take an alternate path. You fought your way to a helipad outside, just in time to see that chopper of yours ambushed by other monsters and crashing - cue the rest of the game where you took the long way upstairs by fighting through multiple levels infested with monsters.

* LivingGasbag: Mutant spores, floating enemies with a single red core in it's center surrounded by a fleshy sac full of air. They're an ActionBomb-type enemy who self-destructs into a bunch of projectiles.

* ProtectionMission: The first stage of have a locked area where the only exit is an electronically-locked door where a {{redshirt}} tries hacking through, just as various mutant monsters bursts out from surrounding vents and attacks from all sides. You'll need to cover him for 30 seconds and fend off the monsters, and if the redshirt dies you'll need to restart the area.

* RecurringBoss: The "Prototype" mutant monstrosity is initially fought in the room it's created in. After it's defeat it will reappear in the control center, several minutes of gameplay and two other bosses (after the set of tentacles in the lab and the BrainMonster in a pool) later. And then comes back immediately after it's second defeat, a third time in the docking bay. It's third form is upgraded with a SpreadShot ability of yellow energy bolts for good measure.

* SceneryGorn: Every single interior area, basically, in ruins after a massive mutant outbreak. It's either filled with destroyed machines or facilities, or littered with the dead. And crawling with assorted monsters.
* SequentialBoss:
** The second boss, a skinless giant humanoid mutant with spider-legs growing out it's back, which your character fights in an elevator. It's first form alternates between throttling you from up close or using the spider-like appendages on it's back to lash out, until you kill it. But then you're treated to a cutscene where the appendages ''detaches'' themselves from the mutant's corpse as a GiantSpider (even larger than the mook-variety spider monsters) to continue attacking with a new life meter.
** The giant brain with an eye in the lab needs to be killed ''thrice'', it's first defeat having it collapsing, with its eyes and limbs shrinking back into it's body. But alas, it instantly regenerates a second eye and replaces it's limbs with tentacle barbs, and it's life meter refills. Kill it a second time and it's organs shrinks back... before regrows yet another eye, a ''mouth'', and ''four'' tentacle barbs. With the ability to fire energy bolts. Thankfully after the third defeat the monster then shrinks into the pool and dissolves away.

!! The Playable Characters:

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/ch_5.PNG]]
[[caption-width-right:350:'''L - R''': Rick (big bazooka), Mituki (two guns), Vogt (big knife)]]
* Rick TheHero, the balanced JackOfAllStats who carries a laser-shooting bazooka.
** LimitBreak: Holding on firing before releasing turns Rick's bazooka into a thick, WaveMotionGun that obliterates everything in his way.
* Mituki TheSquadette, the sole female playable character who uses [[GunsAkimbo two light machine-guns, akimbo-style]]. And a capable hand-to-hand combat expert.
** LimitBreak: A powerful SpreadShot that fills the screen with projectiles opening in an arc.
* Vogt, the team's [[TheBigGuy powerhouse]] and also a BladeEnthusiast, armed with a modified heavy-duty blaster and huge combat knives for close-range attacks.
** LimitBreak: Turning the blaster into a [[FireBreathingWeapon flamethrower]] and unleashing a wall of flames incinerating everything in front of Vogt.
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Interestingly enough, the game managed to spawn a sequel, ''Chaos Break'' (despite ending on a haunting note that couldn't possibly have room for one[[note]]the game actually does have a good ending, which ''Chaos Break'' seems to follow off of, but the means to trigger it is so obscure very few people saw it[[/note]]), but it's in the SurvivalHorror genre instead of an arcade-style shooter.
----

In a Tokyo biolab, an outbreak from a virus strain have resulted in giant, mutated monstrosities being spawned at an alarming pace, with the lab's personnel slaughtered by the creatures before the entire facility goes into lockdown. To contain the mutation from spreading into the city, it's up to a trio elite commandoes, each with their own special abilities executed by holding down the firing button long enough, which the player controls to infiltrate the lab and take on the monsters:

Interestingly enough, the game managed to spawn a sequel, ''Chaos Break'' (despite ending on a haunting note that couldn't possibly have room for one), but it's in the SurvivalHorror genre instead of an arcade-style shooter.

* AndThenJohnWasAZombie: How the game ends: [[spoiler:in the final cutscene, after destroying the last mutated monster, your character then boards an evac chopper, having a conversation with a {{redshirt}}. Cue a ReactionShot of the redshirt seeing something horrifying, before cutting back to your character - now a mutant monster yourself, having been infected during your escape]]. Then Roll Credits.

* UniqueEnemy: Some green-skinned, amphibian-looking mutant humanoid creatures appears in the lab near the chemical pool, dropping from the ceiling to attack, but they do not appear anywhere else for the rest of the game. In contrast, the same area also introduces the LivingGasbag mutant spore enemies, who appears in subsequent areas outside the pool.

* BodyOfBodies: Several of the bosses are just multiple carcasses of both humans, animals and machines, stitched together by the mutation. The "Protopye" notably seems to be at least five different bodies stitched into one, and a later boss is a set of humanoid lungs with a serpentine neck and waddling on spider-legs, at least one which is a human's.

* ItCanThink: The mutant growth is assumed to infect only living beings, like the facility's personnel animals in cages. But you can come across ''machines'' animated by the mutants as occasional mechanical enemies.

[[caption-width-right:350:'''L - R''': Rick, Mituki, Vogt]]

* MacrossMIssileMassacre: All three players can execute a special move that turns their current weapon into a missile launcher that unleashes a whole volley on mutants. And [[HomingProjectile home in on the nearest target]] for good measure.

** The giant brain with an eye in the lab needs to be killed ''thrice'', it's first defeat having it collapsing, with its eyes and limbs shrinking back into it's body. But alas, it instantly regenerates a second eye and replaces it's limbs with tentacle barbs, and it's life meter refills. Kill it a second time and it's organs shrinks back... before regrowing yet another eye, a ''mouth'', and ''four'' tentacle barbs. With the ability to fire energy bolts. Thankfully after the third defeat the monster then shrinks into the pool and dissolves away.

--> [[TemptingFate Well, at least you got back in one piece]]''...\\
…'''''[[AndThenJohnWasAZombie oh no!]]'''''