K-O-N-G Letters are items in Donkey Kong Country Returns. They are yellow letters on brown tiles that are spread out and form the word "KONG" when all have been collected. This is why they are named this way. Collecting all K-O-N-G Letters in a world unlocks a hidden temple stage, which contains a Rare Orb that is required to unlock and enter the Golden Temple. Surprisingly and interestingly, while playing the game in Mirror Mode, the letters are flipped as they would appear in a mirror.