Quantum Conundrum

Quantum Conundrum is a puzzle-platformer viewed from the first-person perspective. As the boy protagonist, the player can run and jump, interact with various switches, and lift light objects. The player can die by falling into toxic liquids, bottomless pits, or falling from too great a height, and if hit by destructive lasers; this will restart the player at the start of a puzzle or a checkpoint if passed. The goal of each room is to reach its exit door, though it may be necessary to activate certain switches or other devices before the exit can become available.

Most puzzles require the player to manipulate the room and objects within it using four different dimensions which impart unique physical properties to the world. The four dimensions are the Fluffy dimension, where objects are ten times lighter than normal, allowing the character to pick up most non-fixed objects, the Heavy dimension, where objects are ten times heavier than normal; the player cannot pick up any objects, but their new density allows them to avoid destruction by laser beams, the Slow dimension, where time crawls to ten times slower than normal, though the player moves at normal speed, and the Reverse Gravity dimension, where gravity is reversed, though the player is unaffected by this. Only one dimension can be accessed at a time (including the normal dimension); when dimensions are switched, all objects retain their existing position and velocity, the latter becoming a critical factor in solving many of the game's puzzles. For example, with access to the Fluffy and Slow dimensions, the player can pick up a heavy safe in the Fluffy dimension, toss it towards a distant platform, and then immediately switch to the Slow dimension, giving themselves enough time to jump onto the safe as it crosses the gap to the platform.

The silent player-protagonist is the twelve-year-old nephew of the highly intelligent, but somewhat eccentric, Professor Fitz Quadwrangle (voiced by John de Lancie). He is sent to stay with Quadwrangle, who is unprepared for his arrival as he is presently working on an experiment. The experiment goes awry, causing Quadwrangle to become trapped in a pocket dimension with a loss of memory of what went wrong before, but able to watch and communicate to the protagonist. The results of the experiment leave portions of the Quadwrangle mansion in flux between four dimensions with alternate properties.

Quadwrangle guides the protagonist to acquire a glove that can tame these fluxes through which he can then safely travel through the labyrinth of rooms to reach three separate power generators and restart each, which Quadwrangle believes will allow him to escape the pocket dimension. The protagonist also gains help from IKE (Interdimensional Kinetic Entity), a small alien creature that Quadwrangle had adopted as a pet during his travels. As Quadwrangle guides his nephew, he tries to recall the exact events leading to the current situation.

Kim Swift was one of the developers of 2007 video game Portal by Valve, an extension of her student team project Narbacular Drop from the DigiPen Institute of Technology. She also spent time helping to develop Left 4 Dead 2 after Portal's release. During that period, she came up with the general concept of Quantum Conundrum during a trip to a local bakery. During the initial states of the development of Portal 2, she had approached Airtight Games with the idea, who saw Swift's game concept as a means of expanding their own portfolio of games for a broader audience, and offered her a position there.

Swift departed Valve for Airtight in late 2009, stating that with "the opportunity to work on innovative titles with my friends over at Airtight", she "couldn't pass it up". She initially worked with the team on a project that was later cancelled after about eight months; work on Quantum Conundrum began in the second quarter of 2010, while efforts to secure a publisher started in the following months.

Quantum Conundrum received generally favorable reviews from critics. 36% and 79/100. Destructoid gave Quantum Conundrum a perfect 10/10 score, claiming that "you are an idiot if you don't buy Quantum Conundrum." 5/10, while praising the game saying "With its physics-warping mechanics, thoughtful brainteasers, and playful atmosphere, Quantum Conundrum should appeal to the legions of Portal fanatics."

com gave the game a B−, but stated: "But even in a vacuum, Conundrum's brilliant moments are hampered by an inconsistent world, an emphasis on performance rather than ingenuity, and a level of humor that wouldn't be out of place at your local pre-school." Some may complain that it's not as funny or as clever as Portal, but Quantum Conundrum is a unique experience that deserves attention nonetheless." IGN gave Quantum Conundrum an 8/10, praising the clever puzzles but criticizing "lack-luster" environments and the game's ending.

Square Enix announced in June 2012 that it was working with iam8bit to develop an advertising campaign, which is a spoof of a television game show based on the game, entitled The Super Dimensional Quantum Learning's Problems and Solutions Gametime Spectacular!!. The show is hosted by G4TV's Kevin Pereira. There are four episodes produced, each dealing with a different dimension. The shows involve putting players into scenarios based on the alternate dimensions from the game.