From HintWiki

The artifact

As explained in the introductory video, you first need to find the Three key pieces, then go on to find the disk artifact. You shouldn't be reading this unless you've found all of the pieces of the key.

Locations

• The Tower
• Under the tower
  • The House
  • The 4-Tower maze
  • The Grand hall
    • The Artifact room
  • The Artifact room
• The Circular train
  • Glass maze
  • Force field maze
• Blue room