9. 'Brain Age: Train Your Brain in Minutes a Day!'
The original Brain Age was a risky move for Nintendo, a collection of puzzles and logic tests intended to be played every day as a tool for self-improvement. "Suduko included!" the cover declared, which is the most mid-2000s thing imaginable. Brain Age turned out to be an unlikely hit, selling 19 million copies, and although the neuroscience behind its benefits is debatable, the idea of self-improvement via play led directly to the many motion-controlled fitness games that followed. A game about making ourselves smarter was followed by a rash of games about making ourselves buffer, and finding wry commentary in that is left as an exercise for the reader.