What is Missing is a free trivia game developed by ToroGames for Android devices. The game is designed to test your knowledge and observation skills by presenting you with an image in which something has been erased, and you must guess what it is. The game features over 200 levels, each with a different image to solve.

As you progress through the levels, the game gets more challenging, and the solutions become harder to guess. However, you can earn diamonds with each correct answer, which you can use to get clues in the form of a letter contained in the answer or to reveal the answer altogether. The game is addictive and fun, and it's a great way to pass the time while testing your knowledge.