Ready to challenge your brain? Below is a collection of brain teasers, games and puzzles & the answers. You'll be able to find all the past brain teasers, games. Riddles online. Challenge the hardest riddles ever to solve the main puzzle and enhance your intelligence. Free hard riddle game online. Only 44 people have been certificated for finishing the game. That's about Quick thinking and sharp reactions are great for riddles and for online poker.