Hybrid Heaven was one of the very few [=RPG=]s released for the UsefulNotes/{{Nintendo 64}}. It was made by {{Creator/Konami}} and released in 1999.

You play as Diaz, a genetically modified being created by aliens to assist in their mad plot to take over the world. You quickly learn the horror of your misdeeds and seek to bring down this alien organization from the inside, saving the world in the pro--

Oh, wait, that's not right.

No, it turns out that you're not Diaz at all. You're actually Johnny Slater, Secret Service agent extraordinaire, kidnapped by aliens and disguised as Diaz to prevent the evil alien menace from making a clone of the President and using him to take over the world.

The story isn't the most original thing in the world.

What is original about the game is its unique combat system. When engaging in a fight with an enemy, you and your opponent immediately put up your dukes and begin circling around each other. You navigate a series of menus to determine if you want to punch, kick, or throw the enemy, and then you go on to specify exactly what kind of punch, kick, or throw you want to use. It's a rather interesting blend of an RPG/Fighting/Wrestling game. Additionally, while your character does level up in a traditional RPG style, he also levels up in several other ways. The various moves that you use also level up to increase their power, and all of the limbs that your character uses in combat level up their offense or defense depending on how often you use them/how often they get hit.

Despite this interesting system for combat, it's very easy to recognize that the game is quite flawed. Outside of combat, the character can be rather difficult to control, and most of the game consists of little more than running down dozens of similar-looking hallways, blowing up robots, and occasionally fighting a new enemy. But it's entertaining.

The game was released to rather average reviews and scores, and would probably have completely disappeared from peoples' memories were it not for the fact that it is one of only a handful of [=RPG=]s released for the N64.
!!This game contains examples of:

* ArtificialStupidity: Given that most of the enemies follow their routines to a fault, some of them may become suicidally obsessed with doing something that leaves them wide open, and will keep doing it until they succeed. The worst example is the foes who just suddenly decide that they ''must'' grapple with you, and won't stop trying no matter how many times you shatter their kneecaps and send them flying.
* BossInMookClothing: Gacrux. Dear God, ''Gacrux''. The game recognizes it as a normal enemy, but many people have less trouble with some bosses than they do with this monster. It has excellent stats, a breath weapon (meaning you have to spend the entire fight standing right next to it to keep it from using said weapon), and can charge up his attacks ridiculously faster than you can. Last but not least, its bladed arms are all but impossible to block.
* BullfightBoss: [[spoiler:The final stage of one boss fight involves the enormous monster charging straight at you. You have to stand in front of a weak wall and run out of the way just in time, allowing the monster to burst through the wall and fall to its death in the BottomlessPit beyond. And yes, it is possible to be a little too late and get tackled by the monster to your own death.]]
* CrosshairAware: One of the two boss fights that do not utilize the combat system has a crosshair following you, telling you where the monster's fireballs are going to land. [[spoiler:You're expected to get the crosshair to target the other monster.]]
* DualBoss: A boss fight that does not involve the game's normal combat system has you fighting two enormous monsters at once. Well, not so much fighting them as running away from them and using trickery to beat them both.
* EscapeSequence: The entirety of the second level of the game consists of you running away from an enormous monster. And it's the kind of escape sequence where, every time you think you've gotten away from it, the monster returns by coming through a secret door or coming down an elevator.
* EverythingFades: All defeated enemies turn white before disintegrating.
* EvolvingAttack: Part of the RPG mechanics of this game is this, with you gaining more attacks both from leveling up your body parts and [[MegaManning receiving attacks you don't have from enemies]]. It even works with the secret "Combo Attacks"... [[GuideDangIt if you can figure out how to do them.]]
* ExponentialPotential: By the end of the game, depending on how many moves you learned from enemies, you might have around 70 different moves at your disposal, spread amongst punches, kicks, and wrestling moves. It is extremely unlikely that you will be using all of them evenly in combat.
* GiantSpaceFleaFromNowhere: [[spoiler:The evil alien traitor was really being secretly mind-controlled the whole time.]] Bonus points for somewhat resembling an actual flea.
* GratuitousJapanese: Attacks directed at opponents on the ground are called "Newaza", which is an untranslated Japanese term from Judo for techniques performed on grounded opponents, like pins and holds. However Newaza techniques in ''Hybrid Heaven'' also include [[KickThemWhileTheyAreDown applying your boot to you opponent's head]] and [[FinishingStomp curb-stomping them]], which [[CaptainObvious would not be considered legal ne-waza techiques in actual Judo]].
* HeroicSacrifice: [[spoiler:Johnny tackles Diaz off the elevator in order to keep the President alive while there are explosions all around them. Becomes averted where after the battle, the President comes back to save Johnny and they both escape in time.]]
* MirrorBoss: [[spoiler:The final boss fight of the game is against Diaz, the character you took the identity of at the beginning. During the fight, you'll find that his fighting style is very similar to yours.]]
* NoCureForEvil: Averted. Some enemies will use healing items to restore their HP.
* OneHitKill: There is a rare item you can collect in the game called the Ring Eraser. When you use it in combat against a non-boss enemy, it instantly ends the fight by causing your enemy to [[DisintegratorRay fade out of existence.]] Predictably, you don't get anything from beating foes with it.
* OurPresidentsAreDifferent: Several varieties, all technically personified within the same person. [[spoiler:The most obvious is President Target, as you spend a good chunk of the game rescuing the kidnapped President repeatedly from his Hybrid captors. The second is the President Evil form, as the Hybrids' master plan revolves around cloning the kidnapped president and using the clone to take over the world. The final form is President Action, as one of the final moments of the game is [[CrowningMomentofAwesome the President of the United States running up on a stage and punching out his clone in front of the entire nation before giving a thumbs-up to the protagonist.]]]]
* PowerCopying: You learn new moves by having enemies perform them on you.
* RuleOfCool: Fighting aliens isn't anything new, but fighting them with punches, kicks, and wrestling moves while they fight back the same way? Win.
* SequentialBoss: And how! The final sequence of the game has you fight a whopping six boss fights in a row with no opportunity between fights to save or heal. Three of the bosses are technically different forms of one enemy, and the other three are all individual enemies. Hope you saved up your healing items.
* StellarName: Every single enemy in the game (with the exception of the human hybrids and the Master) is named after a star.
* SubsystemDamage: In combat, individual body parts can be damaged on both you and the enemy. A damaged body part cannot be used in combat, and if the legs are damaged, then movement is slowed. Additionally, if the head is damaged, then the character is considered to be unconscious and can do little more than sit back and let the opponent beat the somewhat-living crap out of it.
* SuddenlyVoiced: Throughout the entire game, the protagonist does not say a single word, and it seems like he is your standard [[HeroicMime Heroic Mime]]. Then, during the ending cinematic, he suddenly starts talking (with full voice acting!) as if he'd been doing it the entire time. It's actually pretty jarring.
* TakeOverTheWorld: Played horrifyingly straight. No reason is ever given for why the villains want to take over the world. They just ''do''.
* TheReasonYouSuckSpeech: The Hybrids have this in spades. Not only are they all amazingly over-confident in their invasion plans of taking over the world (except for perhaps Anna, the most loving Hybrid, and Diaz, who doesn't really care about the invasion and simply wants to kill Johnny), but they all always and continuously complain about how the human race is so inferior to them, and their only apparant reason for wanting to take over the Earth is because they think they're better than everyone else. Not only that, but each of the leaders keep continue telling Johnny that he is fighting for worthless humans, and that he should be dead. Also, it seems that no matter how much ass Johnny kicks, how much of the plan is ruined because of him, and just how much they underestimated him, the Hybrids continually shrug this off and when the leaders fight Johnny themselves, they still think they'll win and be able to go on with their invasion (which by this point is obviously SNAFU), and even when the invasion is completely and totally beyond FUBAR, TheDragon says everything is going as planned. When it comes to over-confident villians who don't even take a hint when their main enemy has single-handedly destroyed their base, ruined their invasion, saved the president, and aborted their whole friggin' species, the Hybrids play this very straight.
* WrestlerInAllOfUs: Yes, one of your primary methods of attacking your alien enemies is by ''wrestling'' them. While some of these moves are simple suplex and chokehold moves, there are many more that would have absolutely [[RuleofCool no place in real combat]], and oddly enough, seem to actually require the cooperation of the opponent to carry out.