It's been four years since Donkey Kong Country: Tropical Freeze originally launched on the Wii U, and fans are still discovering new secrets in the game. Twitter user Shane Marchis discovered that the game contains a Metroid Easter egg in the Amiss Abyss level in both the Wii U and Switch versions of the game. The secret has been undiscovered until now because it is found by progressing through the level and then attempting to backtrack through a seemingly-impenetrable barrier.

To unlock the secret, players must navigate Donkey Kong through the level until they pass through an underwater tunnel that closes behind DK. However, you can still make your way back through the stinging sea anemone guarding the path that you just came from (although you will take a bit of damage). After passing through the barrier, a Metroid will appear in the background.

What do you guys think? Is this a pretty cool secret or what? Check out the video below to see it for yourself, and let us know what you think in the comments!