Plot: Cube: 3D Puzzle Mayhem, known as simply Cube in North America and as Simple 2500 Series Portable!! Vol. 10: The IQ Cube: Moyatto Atama o Puzzle de Sukkiri!, is a puzzle video game developed by Metia Interactive and published by D3 Publisher in 2007. Wikipedia
Plot: Puzzle Guzzle is a video game for the PlayStation Portable. This game is based on puzzles and you get assigned an avatar which can be customized during the game Wikipedia
Plot: Bliss Island is a puzzle video game developed by PomPom Games and published by Codemasters for PC and PlayStation Portable. The title was released on Xbox Live Arcade on March 12, 2008. Wikipedia
Plot: PQ2: Practical Intelligence Quotient 2 is a puzzle game for the PlayStation Portable, and a sequel to PQ: Practical Intelligence Quotient. The game is based on testing the model of human intelligence developed by Dr. Masuo Koyasu at Kyoto University. Wikipedia