The Queen's Domain endgame challenges are the things the credits do not finish: 69 Strange Silver Etched Skulls, six Vault doors, ten data modules, fourteen books, eight mementos, the rest of the bestiary past 180 entries, and the four statues that only turn up after you have already seen the first ending. Every one of them is counted for you in the in-game Challenges menu and on the Steam achievement list, so the work is finding them, not tracking them.

The two menus that count everything

Two places track your progress, and between them they count nearly every collectible in the game:

  1. The in-game Challenges menu.
  2. The Steam achievement list.

Both track how many of each collectible exists in the game, and both include the number of secret walls, which is the one counter that tells you whether you have found every passage rather than just every item.

The bestiary is the part that does not have a single menu — it runs past 180 entries, and the Library alone holds the mobs that account for 140 or more of them. How the entries fill is in the bestiary guide.

Queen's Domain endgame challenges: the 69 silver skulls

The 69 Strange Silver Etched Skulls are the biggest single item in the game. To get to the place that takes them:

  1. Collect all four lenses and all five Trident Emblems — these are what open the way into the Petrified Garden.
  2. In the Petrified Garden, whack the fish statues three or four times to activate the symbols.
  3. Jump down into one of the houses.
  4. The place that accepts the skulls is the area with the door. Hand in all 69 and the door opens for the dark ritual, which is the trigger for the last ending.

There is no counter for how many skulls you have already handed in, so you hunt them blind and have to hope your last one really is the last one. The skulls pay out rewards as you go, and one of the later rewards helps you at level 30.

The two optional pieces that go with it are the Memento Mirror, whose clue reads Seek the souls you once knew and which sits in the same area as the ancient-time gates, and the Ancient Stone Duck — fully upgrade the Mask of Second Sight, teleport to the Petrified Garden, break the four seals, jump down, speak with the stone, and after you have spent the skeleton skulls it hands you the duck.

Hidden walls and the Stone Cube are in the secrets guide.

The full completion list

Everything the game asks you to find:

  • Four lenses — Puwema's, Jigeki's, Wodaso's and Sipeha's.
  • Five Trident Emblems.
  • Four Ceremonial Stone Tiaras.
  • The seal breakers — Orange ocre, Blue cobalt, Teal green, plus the seal breakers of cups, pentacles, swords and wands.
  • Six Vault doors — Red 1 in the cavern beneath the Tower of Knowledge, Red 2 in the Verdant forest near the Petrified Garden gate, Blue 1 in the dark part of the occult labyrinth reached through the secret walls above the first mimic, Blue 2 in the Rotting Cavern behind the four-triangle door, and Green in the circular stairwell by the Mausoleum teleporter.
  • Ten data modules.
  • Fourteen books.
  • Eight mementos.
  • The four statues you only find after the first ending.
  • A bestiary that runs past 180 entries.

One collectible has a side effect worth knowing: the broken Green door behind Obmuer Island, in the caves leading down to the Rotting Cavern, is what makes the shopkeeper start selling the first vault key.

The four statues that only appear after the first ending are the reason you cannot finish in one pass — the sequence is in the endings guide.

Two fast ways to farm

If what is left is levels or herbs rather than finds, two spots do the work fast:

  • The right/wrong gargoyle puzzle spawns a lot of enemies every time you rest, which makes it a good place to level up and stock up on medicinal herbs.
  • Pulling a swarm of fish onto the beach and hitting four to six of them with one swing is one of the fastest ways to level in the early game.

General fighting and saving habits are in the tips guide.