Map of Nightmare World, exploring is so far....
The Secret Level (also called Nightmare World) is one of the most popular gaming myths ever.
To enter the Secret Level, you must have a plain yellow snake in between 8000-9000 mass. When you do, go a tiny bit above the middle and head East (Go to the right) When you hit the border you don't die, instead a secret tunnel is revealed, go in it, and you will go through a tunnel of dead snakes. These are dead Suicide Snakes, Suicide Snakes are snakes with no player, Make a wrong turn and you're dead. Going too far though, a giant snake that supposedly has 1700000 mass surprises you and will make you jump. If you die from him a video of a real life snake is on the screen and tries to hypnotize you, then the screen restarts. [1]