[[caption-width-right:350:Ooooo... [[WhatDoYouMeanItWasntMadeOnDrugs trippy]].]]
-> ''Cracking... \\
Security attack''

''Rez'' is a RailShooter by Creator/{{Sega}} that's set in a futuristic computer ''supernetwork'' called the K-project where much of the data flow is controlled by an AI named Eden. Eden has become overwhelmed with the amount of knowledge gathered on the network, causing her to doubt her existence and enter a shutdown sequence, which will mess things up big time since society as a whole depends too much on technology. The gamer plays a hacker, logging into the K-project system to reboot Eden while destroying any viruses or firewalls that happen to inhibit progress, and analyzing other sub-areas of the network to gain access to Eden's location.

The game's music and sound react to the player's actions in a way that allows you to partially compose the BGM as you play. A very trippy game that [[VindicatedByHistory did not get the commercial success it deserved]].

''Rez'' was released on both the SegaDreamcast and the {{PlayStation 2}} in November 2001 in Japan, and in early 2002 in Europe and North America (though North America [[NoExportForYou did not get the Dreamcast release]]). Due to its weak sales, it soon became a rare gem. However, thanks to the release of ''[[UpdatedRerelease Rez HD]]'' on XboxLiveArcade in 2008, anyone with a {{Xbox 360}} and access to Xbox Live can now not only enjoy the game for 10 dollars (at least in the U.S.), but with even more stunning high-definition visuals and discrete 5.1 channel audio as well.

It has received a sequel, ''ChildOfEden'', utilizing Microsoft's new Kinect interface. The trailer also indicates a PS3 release, probably utilizing Playstation 3's new Move interface. It is about eliminating viruses in order to secure the first AI "birth", Lumi, the AI duplication of the first space-born human girl.

Not to be confused with [=ReZ=], the host of the video game soundtrack review show WebVideo/ReZonanceSoundtrackReviews. But it does use the song “Buggie Running Beeps” from this game as its ThemeTune, though. It should definitely not to be confused with the song by Music/{{Underworld}}, however. Nor should it be confused with the arch-nemesis of VideoGame/{{Gex}}.
!!These games contain examples of:
* AfterBossRecovery: Not with the stage 1-4 bosses, but after defeating each of the Personal Firewalls guarding the last boss, you get health and overdrives (if you can snatch them up fast enough).
* AIIsACrapshoot: Kind of. It's not really Eden going evil so much as her having a massive breakdown.
* AllThereInTheManual: The story for both ''Rez'' and ''Child of Eden'' is in both manuals and supplemental material, including [[http://en.wikipedia.org/wiki/Genki_Rockets the origin of the latter's titular character.]]
* AncientEgypt / PyramidPower: The design motif for Area 1.
* AncientGreece: The design motif for Area 2.
* AndIMustScream: Implied by the system if you lose to the boss:

[[folder: The system is trying to shut down, trapping you inside! Defend yourself until [Earth/Mars/Venus/Uranus].GIGA/TERA is destroyed or self-destructs! ]]

* ArabianNightsDays: The design motif for Area 3.
* BeehiveBarrier: Venus's shell.
* BishonenLine: Followed by the player, unusually; each level-up makes the humanoid player avatar slightly less abstract- except the penultimate form is a glowing sphere, and the ultimate form? [[spoiler: A 2001-style space fetus]].
* BonusDungeon: The Lost Area.
* BossRush: An unlockable mode. In addition, the last boss features abbreviated versions of the first 4 bosses before you fight the real thing.
* BrownNote: The game's ''mission statement''.
* ContentWarnings: Both ''Rez'' and ''Child of Eden'' warn players susceptible to seizures that they might to exercise caution playing.
* CoresAndTurretsBoss: Earth, the Area 1 boss. Venus, the Area 3 boss has a massive wall of turrets as its outermost protective layer.
* {{Cyberspace}}
* CyberpunkIsTechno: Both artistically and musically.
* DeadlyWalls: The second phase of Mars, the Area 2 boss.
* DummiedOut: The Rez beta [[http://www.youtube.com/watch?v=KA6glWxMcRc used a mix]] of Underworld's ''Rez'', ''Cowgirl'', and ''Born Slippy'' for Areas 1 through 4 (Area 5 was [[http://www.youtube.com/watch?v=klrCjkY5vU4 already using]] ''Mind Killer''). Only a [[http://www.youtube.com/watch?v=NwBhUMU09wU handful of samples]] made it to the final release.
* EasyModeMockery: Travelling mode gives you invincibility, but does not save your stats nor does it let you access Area 5.
* ExtremeGraphicalRepresentation
* FanNickname: The Lost Area is occasionally referred to as "Area 0" (it doesn't even have [[spoiler: a boss battle]]). The giant cylindrical ship you meet about halfway through the Area 5 stage sometimes gets the name "S.S.[[note]]or USS or HMS[[/note]] [[FreudWasRight Sigmund Freud]].''
* GuestFighter: The Morolian from ''SpaceChannel5''.
* HollywoodHacking: Not as absurd as ''{{Hackers}}'', but close.
* JidaiGeki: The design motif for Area 4.
* JokeCharacter: The Morolian. It's essentially like being on the Zeroth Form (making you a {{One Hit Point Wonder}}) ''and'' you can't go up a form (meaning you always stay that way). It's basically there as a {{Self Imposed Challenge}} and, of course, as a {{Shout Out}} to ''SpaceChannel5''.
* LighterAndSofter: ''Child of Eden''.
* MacrossMissileMassacre: A common tactic of many bosses and occasionally a few enemies. Can be one of the most dangerous parts of a fight because unlike in many games, there's no way to dodge attacks, so you have to shoot down every missile. If you get overwhelmed you can go from 5th form to game over in a few seconds.
* MarathonBoss: The bosses of Area 2 and Area 5.
* MasterComputer: Eden.
* MindScrew: Pretty much the entire game, but ''especially'' the Trance Mission mode, whose BGM is complete cacophony.
* MultipleEndings: A ItsAWonderfulFailure for losing to the Area 5 boss, a partial ending for defeating it, a GainaxEnding for defeating it ''and'' staying in your final form, and a GoldenEnding for defeating it while in your final form '''and''' get a 100% clear in the whole game.
* NintendoHard: Surprisingly averted, for a game that shares a lot of tropes with {{ShootEmUps}}. You die in one hit, have no mid-stage checkpoints and have to shoot down waves of enemies, but the game isn't especially hard, since you lock onto enemies instead of having to manually shoot them.
** However, getting the good ending is ''extremely'' {{Nintendo Hard}} as it requires you to complete the fifth level and defeat the final boss while in the final form i.e. you must not take a single hit throughout the entire level and boss fight.
*** There's also a best ending which not only requires you to finish in final form, but take out ''every single'' enemy in the final stage. It should be noted that the relative length of the final stage, plus the fact that certain targets on the final boss drop Progress Nodes, mean it's very possible (but much harder) to fulfill the criteria after taking a hit or two.
* OneHitPointWonder: Each form can only take one hit before you go down to the next one. If you get hit when you're playing as the zeroth form, it's {{game over}}. You start at first form and can rank up by collecting pick-ups from enemies.
** There's also an unlockable [[SpaceChannel5 Morolian]] skin. When using it, you're a true OneHitPointWonder since you can't upgrade your form.
* PowerPerversionPotential: In Japan, the game shipped with what was called [[ExactlyWhatItSaysOnTheTin The Trance Vibrator]]. Designer Tetsuya Mizuguchi says it has "no sexual meaning"...[[http://www.gamegirladvance.com/archives/2002/10/26/sex_in_games_rezvibrator.html right]]. The Xbox Live Arcade remake offers vibration for three more controllers in lieu of Trance Vibrator support.
* RhythmGame: Sort of. You hear beating musics in place of sounds when you do aim and fire.
* SceneryPorn
* ScoringPoints: Score Attack mode. Optimal scoring strategies revolve around getting as many x8 lockons as you can. Unfortunately, so is dragging on boss battles.
* SecretLevel: Lost Area in ''Rez'', Hope in ''Child of Eden''.
* SequentialBoss: Venus has three parts--a massive wall of laser turrets, seemingly endless streams of manic flying fish, and the core itself.
** [[spoiler:Eden]], the boss of Area 5 treads the line between this and a BossRush.
* ShootTheBullet: Because the game is a rail shooter and you usually have no way to move your character, shooting down bullets, missiles, and whatever else is aimed at you is the only way you can defend yourself.
* ShoutOut: The final level's music features prominent usage of the phrase, "[[{{Franchise/Dune}} Fear is the mind-killer]]".
* SmartBomb: The overdrives. in ''Rez'', Euphoria in ''Child of Eden''.
* UpdatedRerelease: The ''[=PS2=]'' rerelease, as well as ''Rez HD'' on XBLA.
* VariableMix: By far one of the most prominent examples outside of a RhythmGame.
* WakeUpCallBoss: Mars.TERA is far stronger than its own .GIGA counterpart, let alone Earth from Area 1. It throws barrier walls at the player twice as often (including mixing in walls that are twice as powerful), and its tentacle-guns fire much more often and rapidly.
* TheWorldIsJustAwesome: The final stage, when you're floating above the world, and after going through the evolution cycle set up throughout the rest of the stage.
-> ''Security breached \\
Analyzing Data 10%''