Press [Esc] to display the menu, then click the "Bonus Code" button.

Anathros sword: 6770-8976-1634-9490
Axe: 1775-3623-3298-1928
Dragon scale armor: 4149-3083-9823-6545
Elexorien two-handed sword: 3542-3274-8350-6064
Hammer: 6231-1890-4345-5988
Lucienda sword: 9122-5287-3591-0927 or 6624-0989-0879-6383
Scroll bonus map: 6972-5760-7685-8477
Labyrinth map: 1797-3432-7753-9254
Two-handed hammer: 3654-0091-3399-0994