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->''PERRRRRRRRRRRRRRRRRRFECT!''

''Intelligent Qube'' (also known as ''Kurushi'') is a puzzle game series for the Sony Platform/PlayStation, developed by the late Sony studio Sugar & Rockets (of ''VisualNovel/{{Yarudora}}'' and ''VideoGame/PoPoLoCrois'' series fame).

You play as a man who, [[ExcusePlot for an unknown reason]], is [[TrappedInAnotherWorld stranded on a floating grey platform in the middle of a featureless black void]]. An unseen '[[TheVoice Voice]]' demands that you take part in an arduous mental and physical trial known as 'Kurushi'.

[[SinisterGeometry Giant cubes stomp]] from the far end of the Stage toward you. You must use your 'mark' to trigger the destruction of each cube, one by one, before they roll off the edge of the Stage, and before they crush you. Succeed, and you'll open your mind to possibilities you never thought possible. Fail, and the universe will never be created. [[WildMassGuessing Perhaps.]]

It was successful enough to garner a couple sequels [[NoExportForYou that never left Japan and Europe]]: ''I.Q. Final'' on the [=PlayStation=], and ''I.Q. Remix+'' on the Platform/PlayStation2. A CompilationRerelease for the Platform/PlayStationPortable, ''I.Q. Mania'', was Japan-only.
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!!Examples

* AndIMustScream: If you fail, it appears that you will fall for a very long time.
* BizarrePuzzleGame: There's nothing in the world but a man and a lot of cubes. And you as that man have to capture all of the cubes to avoid being "avalanched" off the stage into the eternal black void. Why is all of this happening? [[MindScrew Who knows]].
* DeathCryEcho: Fall into the void, and your character will yell as they ''fall forever''.
* FlawlessVictory: Completing a level without errors in the correct number of steps earns you a ''PERRRRRRRRRRFECT'' from the Voice. Completing a level in fewer steps earns you an ''EEEEEEEEEXCELLENT'', and a 'True Genius!' bonus. This is the only way to add rows to the stage. If, on the other hand, you do some miss some blocks, a counter will increment and you may lose one or more rows. You soon learn to do everything humanly possible to ''always get perfects''.
* FunWithAcronyms: '''I'''ntelligent '''Q'''ube. The opening FMV in the first game even spells the name out with the correct spelling before going back to change it.
* LargeHam: The way the announcer belts out ''PERRRRRRRRFECT'' and ''EEEEEEEEXCELLENT''.
* LevelEditor: The game allows you put your own stages together to play.
* MindScrew: It's not really explained what's happening in the game at all. The ending shows the player's character being returned to their normal life, be it in a town, or the army, or wherever, with the Voice sharing some words of encouragement on your victory over the trials of Kurushi. Some endings end with the caption 'The Beginning of the Universe'. If you fail, you fall off the Stage into oblivion, and the universe... simply isn't created.
* NintendoHard: It is extremely easy to fall behind beyond recovery after one or two bad rounds.
* NothingIsScarier: The game takes place in a completely featureless void with nothing but the cubes, your footsteps and the Voice. Without the music, it's very eerie.
* PyrrhicVictory: By the time the last set of blocks appears, it is quite possible that the stage will be so short that few meaningful moves can be made. The only way to survive is to get run over by each wave of blocks, then quickly outrun the collapsing stage. By the time all the blocks have gone, the player can still win the level by being left standing on a stage consisting of ''a single row of blocks''.
* RankInflation: Your "IQ" can go up to 999.
* ScoringPoints: You earn ordinary points, and you're also rated on your 'IQ'
* SinisterGeometry: The only other visible object beside yourself in this game is an endless torrent of unstoppable giant stomping cubes.
* SoundtrackDissonance: It's a game where you dodge falling cubes in the middle of a black void. For some reason, this is worthy of a soaring orchestral soundtrack that sounds like it came from some high-budget adventure movie.
* SpiritualSuccessor: Although they're really completely unrelated, the ''Practical Intelligence Quotient'' (PQ) series is considered by many to be the Spiritual Successor to Intelligent Qube, due to being a sort of test, clean graphics, no plot, and a 'meta person' as the main character.
* TrappedInAnotherWorld: The blackness.
* TrueFinalBoss: Kurushi Tektonics.
* TheVoice: The... Voice.
* UnstableEquilibrium: Your performance on the puzzles is heavily dependent on how many rows of playing field you have to work with. A large playing field affords the player more time to think as the cubes come rolling down; conversely, one that is too short may not even allow the player enough space to execute all of the moves required for a PERFECT. As you make mistakes, rows of the playing field start falling off, and thus you are prone to making even more mistakes. This spiral continues until you don't even have enough space for the next set of blocks to appear, which will result in being thrown off the stage to your death.
* XtremeKoolLetterz: Kurushi Tektonics.
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