You found the Old World!

Beat the game in Challenge Mode.

Collect 1,000,000 bolts over the course of the game.

Complete the game on Easy

Escaped from the elevator.

Fulfilled pacts of Chapter I of The Sorcerer's Ordeal.

Beat the game on Hero difficulty.

Defeat the Nether Leader and banish his kind.

Scare at least one of every type of enemy using the Nightmare Box.

Collect 200 raritanium over the course of the game.

Win the Destructapalooza Gold Cup.

Unlock the vault on planet Thram.