It requires max level in certain skills to get through each room. In each room, there will be a treasure chest (except for the first one, obviously), and the more rooms you get through, the better chance you have of getting a rarer item.

First room -- cut through a special tree (looks reg), requires 200 woodcutting.
Second room -- pickpocket a man which gives you a key (200 thief)(either opens chest, which tele's you back to first room, or opens door to get to next room.)
Third room -- run over a block of metal (200 agility)(gives key)
Fourth room -- slay an abyssal demon (200 slayer)(drops key)
Fifth room -- kill a chaos elemental within a minute (200 atk, str not req. but probably needed) (drops key) (if minute passes, you are kicked back into fourth room)

**fifth room has no door into next room obviously, just a chest.

Chest items:

Second Room - God runite, ranger, or mage equips
Third Room - Verac, Torag, Ahrim, and Karil equips
Fourth Room - All Barrows and rares found in the member shop
Fifth Room - All rares

All items have a 25% chance of being given except for the rares, which are only given out at a rate of 3%. All chests must give a minimum of 1 and a maximum of 3 items.