'''''Quantum Conundrum''''' is a [[FirstPersonShooter first-person perspective]] [[PuzzleGame puzzle]] hybrid game in the same vein as ''VideoGame/{{Portal}}'', of which director Kim Swift was a creative lead.

The player character is the 12-year-old nephew of [[MadScientist Professor Fitz]] [[Creator/JohnDeLancie Quadwrangle]]. When he drops by for a visit, his uncle disappears in an explosion. It is up to him find Fitz through the use of the Inter-Dimensional Shift Device (IDS device), which can move him between dimensions and affect the physics of the world around him.

It was released on June 21, 2012, for the PC, with console releases later on.
----
!!Tropes
* AppliedPhlebotinum: The Science Juice.
* BigLabyrinthineBuilding: The manor, of course.
* BittersweetEnding: [[spoiler: You save yourself from dying when the mansion collapses, and the professor escapes, but now you're trapped in the pocket dimension, and the whole world is being shifted by the Uber IDS.]]
* BookEnds: The generator room in the first wing (The End of the Beginning) and the generator room in the last wing (The Beginning of the End)
* BrickJoke: At one point, the Professor warns you ''not'' to look at Ike in the eyes. [[spoiler: Upon completing the game, you unlock the "Do A Thing!" option on the title screen, where you get to see what happens if you do...]]
* BulletTime: Slow-Mo slows time to a crawl, and lasers that shoot out of the wall can be seen slowly leaving their gun, allowing you to dodge past them before the laser reaches its target.
* CloneDegeneration: Though it doesn't come up in gameplay, this is a limitation of DOLLI. It can be seen with the effect on each successive generation of the Professor's cloned cat. To quote the Professor:
--> ''I want to clarify that Dolli is great for cloning inanimate objects, but she's not entirely capable with organic ones.''
* DamnYouMuscleMemory: ''Portal'' players will kick themselves every time they try to use something and shift dimensions instead. The 'E' key, which tends to be linked to Use in any modern FPS, is the Fluffy dimension hotkey. Use is instead done by left mouse click, which is commonly associated with shooting something. It's softened somewhat by the HUD having a constant reminder of which buttons are used to shift dimensions.
* DeadpanSnarker: Professor Quadwrangle has his moments.
* DoingInTheWizard: Quadwrangle jokes about the possibility that the Inverted Dimension doesn't use an opposite sense of gravity, but instead the mansion is simply upside down. [[spoiler: In the epilogue, the mansion falls off the cliff and [[{{Foreshadowing}} ends up upside down.]]]]
* DungeonBypass: Top speed runs often involve exploiting the game environment to bypass entire portions of some levels.
* EasyAmnesia: Professor Quadrangle forgot the events leading up to his getting trapped in a pocket dimension on account of suffering a bump on the head when the explosion happened. Thankfully, that's all he's forgotten.
* EvilLaugh: Professor Quadwrangle engages in a typical MadScientist laugh, for no other reason than he felt like it and thought his nephew was expecting it.
* ExactWords: Fitz Quadrangle's first great scientific victory, his science fair project, 'The Effects of Radiation on Things'. Not as childish as it sounds: Things was the name of his pug.
* ExtremeOmnivore: Ike's dietary requirements include, among other things, several kilos of meat a day, asparagus, scrap metal, and "whatever else he has a craving for, really."
-->'''Quadwrangle''': Ike says he found your luggage in the lobby. And he would like to apologize for eating your pants.
* FantasticAesop: Prof. Quadwrangle hypothesizes that the reason why tigers are going extinct today is because people are going back in time to when tiger-hunts were legal and shooting them.
* FunWithAcronyms: DOLLI, IKE, etc. Quadwrangle loves them.
* GameBreakingBug: Game physics are tied to frame rate, which means any drop can cause unpredictable physics glitchs. These glitches can make some tests completely unsolvable. In particular, any test which requires stacking objects can result in said objects tipping over in mid-stack, ruining whatever puzzle they were a part of.
* GottaCatchThemAll: There's a couple dozen tiny robots, identifiable by the atomic ring pattern surrounding them, that the player can collect. There's also four blueprints, one for each dimension, which unlocks the use of those dimensions in the sandbox level accessible from the main hall.
* GravityMaster: The Fluffy and Heavy dimensions serve this purpose, making objects ten times lighter or heavier, respectively. Notably, they don't affect momentum; a Fluffy safe thrown in the air will retain its momentum if made heavier in the normal or Heavy dimensions, a vital aspect of solving puzzles.
* GravityScrew: In the Reverse-Gravity dimension.
* GrumpyOldMan: Professor Quadwrangle comes off like this in the beginning, but quickly warms up.
* HaveANiceDeath: Whenever you die, the game helpfully lists an experience that the player character will never have.
** LeaningOnTheFourthWall: Including "Writing depressing comments for a video game" and "Going through this level with one less death."
** Also a possible joke at Nomura: "Eating nothing but ramen for 3 months."
* HeWhoMustNotBeSeen: An odd variant, as while Professor Quadwrangle is clearly seen in paintings, he never appears in person, [[spoiler:unless you count his glowing silhouette in the final levels]].
* HitboxDissonance: There is a number of situations where you're capable of walking over what is obviously a hole big enough for you to fall through, with you effectively standing on air.
* HurricaneOfPuns: All of the books around the Professor's Mansion have titles like "[[Literature/GreatExpectations Great Exponentiations]]" and "[[Literature/HeartOfDarkness Heart of Dark Matter]]". Level titles are no exception, and the Professor chimes in with a few of his own.
* IFellForHours: The last level has a straight drop down a giant tube that takes about a minute to finish. [[spoiler:Thanks to the malfunctioning Uber-IDS at the bottom, this can become even longer if the garbage in the tube is caught by Reverse-Gravity and drags you back up with it.]]
* InfantImmortality: Averted for a little BlackComedy; the player character is explicitly a child (complete with a shorter-than-normal height for the player's viewpoint), and can die in several ways throughout the game. [[HaveANiceDeath It then informs you of one of the many, many experiences the player character will never have]], including being taller than four feet, reaching age 13, and not having peaked at ten.
* IWantMyJetpack: Apparently, the future will still not have flying cars. One of the HaveANiceDeath messages says you'll never have the opportunity to complain about the lack of flying cars.
* {{Kawaisa}}: Apparently, Japan's love of cute things was the result of Professor Quadrangle [[TimeTravel visiting the Sengoku Period]] with [[RidiculouslyCuteCritter Ike]].
* KickTheDog: There's an achievement, "Big Meanie", for knocking Ike over with an object.
* LampshadeHanging: Professor Quadwrangle acknowledges the implausibility of a wall fan somehow managing to pin a fluffy safe to a wall with enough force to support your weight when you use it as a platform.
* LoopholeAbuse: The buttons are pressure-sensitive. While this is meant to keep fluffy cubes (or other normally heavy items) from triggering them, stacking enough fluffy objects onto a button will trigger it, since the weight adds up.
* MadScientist: Professor Quadwrangle is a benign version.
* MalevolentArchitecture: Why this building is designed so that several rooms are potential death traps that can only be avoided with careful use of the IDS is never explained.
* MissionControl: Professor Quadwrangle provides direction, information on how the alternate dimensions work, and various background tidbits.
* MundaneUtility:
** When the professor invented a freaking ''time-machine'' he began using to get futuristic clothing and to legally hunt tigers.
** [[http://cloud-3.steampowered.com/ugc/576709682337245809/010A2E3262F2D3247D24CDAE5D15BC80A7F837FE/ The nuclear Clothes Drier]]
* NiceJobBreakingItHero: [[spoiler: You activating the Uber IDS, combined with all of the spilled Science Juice around the mansion, ends up sending the entire world through the different dimensions.]]
* NoNameGiven: The player character.
* NoOSHACompliance: Professor Quadwrangle is fairly upfront about the unsafe conditions in his home, lampshading it a few times in the particularly deadly tests.
** Played with in the early levels, at least, where a majority of the unsafe things are actually the result of the security measures triggering due to the power going out.
* NotQuiteFlight: One of the tricks to solve puzzles with anti-gravity is to use a moving object to float over long distances through gravity switching. You can get as far as you want, but can't turn.
* NotTheFallThatKillsYou: In the Fluffy Dimension, you become immune to fall damage.
** Although in general, falling from great heights does nothing to you except make your vision blurry for a few seconds. If you die from falling, it's usually because it's a BottomlessPit or a hole filled with Science Juice.
* TheProfessor: Professor Fitz Quadwrangle.
* PunnyName: "Quadwrangle" is a pun on "Quadrangle" (a four-sided polygon) and "wrangle", appropriate given that he's created the ability to shift between four alternate dimensions. Another relative has the last name of "Triwrangle."
* RealityEnsues: Quadwrangle and Ike went to the 19th century because everything was more elegant back then. Then they left because they had to cope with contemporary hygiene practices.
* RequiredSecondaryPowers: Quadwrangle's main inventions (the jetpack, the freeze ray, the glove) all have the ability to act as a mode of transportation, possibly justifying the bizarre platforming elements of the game.
* RidiculouslyCuteCritter: Ike.
* SelectiveGravity: [[JustifiedTrope Justified]]. Since the IDS prevents the wearer from being affected by dimensional shifts, the player experiences gravity normally in the Fluffy[=/=]Heavy[=/=]Reverse-Gravity dimensions.
* SelfImposedChallenge: Each level has a goal for time, dimension shifts, and lack of deaths. Certain ones also have collectibles, which the level select screen helpfully points out. They don't necessarily need to be done together, though all of them are doable as such.
* SequelHook: [[spoiler: The entire world is being affected by the Uber IDS, and Professor Quadwrangle is about to set his mind to both solving that problem and getting the player character back from the pocket dimension]].
* ShoutOut: One of the Professor's time-traveling portraits shows him in future "space" clothes, and also wearing [[VideoGame/DeusExHumanRevolution Adam Jensen]]'s trademark shades.
** [[http://cloud-3.steampowered.com/ugc/594736771570827901/7650A9A0649FE709579F509727CBA5F7474BECB5/ The book titles]] that can be seen refer to things such as DoctorWho and TheLordOfTheRings.
** There is an achievement called [[VideoGame/{{Portal}} Still Alive]], and another called [[VideoGame/Left4Dead Left or Dead?]]
** When referring to his cloned, wall-eyed cat, Quadwrangle mentions nicknaming it "Derp", in reference to the meme.
** There's a level called [[Music/TenaciousD The Greatest Puzzle in the World ... Tribute]].
*** A couple of levels are [[ShoutOut ShoutOuts]] to song titles: [[BohemianRhapsody Is this Real Life? Is This Just Fantasy?]], [[AceOfBase I Saw The Sine]], [[Music/DaftPunk Around The World]], [[LedZeppelin Stairway to Fluffy]], [[Music/TheBeatles Ticket To Ride]].
** Professor Quadwrangle has a story for almost every portrait you look at. A jet pack was named "Joan the Jett Pack" (after Joan Jett) and a digging machine was called "Everyday I'm Shovelin'". There are also many pictures of a dachshund that extend over multiple paintings: it was the first ever rubber dog, and he named it "Angstrom," following that up with a mention of a stretchy rubber toy from the 80s (aka Stretch Armstrong, which actually had a sausage dog version as well).
** The Steam product description, in explaining the premise, helpfully notes "There's a dimension for that!"
** The DLC No Disassemble! trophy is a shout out to ShortCircuit which is also the name of another DLC trophy.
** There's another game where [[Franchise/AssassinsCreed birds and Desmond are related]]...
* StealthPun:
** When changing to the ''Heavy'' dimension, which also turns everything ''metal''lic, half the portraits are depicted in ''heavy metal'' garb.
** Professor Quadwrangle describes the dimension he's trapped in as containing things like cell phones, and the clouds in the sky are apparently made of lint. [[spoiler:It's a ''[[JustForPun Pocket]]'' [[PocketDimension Dimension]]]].
* StupidityIsTheOnlyOption: The Professor's memories start to return, and just as he starts to realize what it is you shouldn't be doing, instead of giving him a moment to warn you, you [[spoiler: finish turning on the uber-IDS and plunge the world into chaos.]]
* SugarBowl: Fluffy dimension, which renders objects much lighter than they are normally, makes everything white and soft. The pictures also become more childlike, such as having those depicted wearing cat costumes and other funny things.
* TakeYourTime: [[spoiler:During the last parts of the game, professor Quadwrangle urges you to go to the Uber-IDS section due to the entire manor shaking and being quite obviously unstable. However, nothing stops you from revisiting the previous sections or just walking around for as long as you want. And when you do enter the Uber-IDS section, there's no time limit on the levels either, despite the constant rumbles. Even when you reach the Uber-IDS and activate it, professor Quadwrangle urges you to get to him before it's too late, but in reality you can just stand there with nothing happening except the frequent rumbles.]]
* TrialAndErrorGameplay: Some of the puzzles are like this, especially since screwing up on most of them will end in your death. One particular test requires exploiting Slow-Mo to have an object above you fall below you so you can land on it mid jump, which a lot of players won't immediately catch on to.
* WhatTheHellHero: Professor Quadwrangle will call you out whenever you start breaking things in his mansion. PlayedForLaughs, of course, since many of the puzzles require vandalism.
----