You have to receive the reed pipe from the statue holding one in the music place then you go to the minotaur door and play this: blue, blue, green, yellow, yellow, red, blue, green. So basically the notes on the door
Place it on the offering stand in Hades throne room.
get the five sacred items, give them to Zeus, go to Hercules, and use the mirror to get there.
you get a pomagranet from the garden of the sphinx and place it on Hade's alter at his palace. The alter is by the door. The door will then open.
To open the underground door on Mythology Island in Poptropica, you need to retrieve the trident from Poseidon. Once you have the trident, use it to unlock the door and access the underground area. Good luck!
you have to get the pomegranates
To get to hades castle: Go all the way to the end of the island and there is his castle. There will be an offering table. Find pomegranates and put them on the table. A door will open. Take it from there.
Once you have the reed go to the door get out the reed and play the colors that are on the reed in the order of the colors on the door ( blue, blue, green, yellow, yellow, red, blue, green)
If you mean the pipe on Mythology island, play blue-blue-green-yellow-yellow-red-blue-green. If you mean on another island, please specify.
you can not get the cat away from the door on poptropica you have to jump over it
you go out the door!
XC
There are doors to open on almost every island on Poptropica. Specify an island name and you may find an answer.