Portal Prelude - Level 04 - Badger Mushroom Easter Egg
This video shows how you can get to the Badger Badger Badger Badger Badger, Mushroom, Mushroom, easter egg area that was programmed into Portal Prelude. It is at the beginning of Chamber 11, or type in "map level_04" in console. It uses edge glitching, and portal fall-through to get into the area. Have fun dancing to the music! :)