Trion Cube is a puzzle video game for the Nintendo DS handheld gaming system, developed by Namco and released in 2007. Players are tasked with fitting together falling blocks of various shapes to form 3x3 squares, which clears them from the play area and increases their score. The game tests players' spatial reasoning and quick-thinking skills as they aim to form 'trions', the game's term for the 3x3 squares, in an endless challenge or through specific stage goals. Trion Cube's approach offers a twist on traditional falling block puzzle games and includes distinctive cute graphics and a catchy soundtrack.