Siraatsu Castle

Route through Siraatsu Castle

1. Cross the bridge and activate the Foyer monument. In the ground-floor hall, the right-hand branch of the left area ends at the Siraatsu Castle Wing Altar.
2. Take the left-hand branch of the same area, drop into the deep pit and fly front-right along the platforms, then ride the lift up. The Iron Fist is on the iron-grating platform and the Plasma Knife under the stairs of the room at the top; upstairs, the 2F corner chest holds the Cups seal breaker.
3. Back in the left-hand branch, the Cups door hides a chest with the Wands seal breaker. On the second-floor green-carpet corridor it opens the Wand room at the far right end, with five platters on the table: Roasted Poultry (Life), Broiled Meat (Attack), Grilled Fish, Steamed Clams and Baked Lobster.
4. Castle Lords Obetda (1,200 Life, weak to Slash) and Ubhaer (1,700 Life, weak to Impact) are the first dual fight on the palace route. Keep both in view and hit whichever one commits with its matching weapon.
5. In the dining room, the chest behind the bar holds the Swords seal breaker. The room left of the bar has a lift to a console room with the Piercing Beam Cannon; in the room after it, the corner chest holds the Pentacles seal breaker and a hidden wall by the wall-clinging skeleton hides Mystic's Mirror, and one of its passages leads to the Elevator Room monument.
6. With the Pentacles seal breaker, the 1F right-hand coin door leads to a deep pit with the Spiked Ball chest beyond the iron tanks, and the coin room on the green-carpet corridor holds the Growth Apparatus. The sword room beside the first pit has a Small Energy Cell on its console.
7. Follow the main route to the Halls of Disrepair monument. Before following the pipe out through the window, the door on the right holds the Quick Charger; in the abandoned incubation room, the orange seal in the right-hand room hides Siraatsu's Data Module, one of Ossi's 10.
8. Dekanima Ritual Blood waits past the flooded hall with water, pipes and blood manta rays: climb the big red pipes and take the small door on the left near the end. Use Impact on the Tauropod (400 Life) and Pierce on the Stalker (350 Life), and keep room so they do not overlap.
9. The High Spec Automatons are on the ground floor: Drilling Unit X (1,300 Life) is weak to Pierce, Besom Cutter Pro (1,800 Life) to Slash. With all three boss fights won, the sealed Foyer door opens.
10. Make a manual backup before Queen Siraatsu (2,600 Life, no known weakness) and keep it for the other endings. Any weapon gives Ending 1; the True Holy Sword Akunra adds the Enraged Queen phase (5,000 Life) for Ending 2; Okbujo's Judgement leads to the Soul of Sipeha (9,999 Life) for Ending 3. Afterwards you wake on the beach on the same save.

Come back later for

• Blood Angel Josami Key from the Rotting Cavern blood ritual: the sword-seal room on the 2F green-carpet corridor holds the Josami Mechanical Mace.
• Hidden enemies to record before the final choice: the Albino Book Bug (attack the book in the storage room beside the bar), the Gilded Pus Bag (hidden wall on the right of the green-carpet corridor, opposite the room with two drilling units and a console) and Cosmic Bones (second one-way oil and water drop room, hidden wall on the empty right platform).
• Flying Mushroom Fossil (30 Silver Skulls at the Petrified Garden trader): fly to the highest ledge under the main hall ceiling for Silver Skull 42.
• Endings 2 to 4: return with Akunra, then with Okbujo's Judgement; Ending 4 also needs the Petrified Garden ritual, all 69 Silver Skulls and the Eat choice.

Bosses

Weapons found here

Enemies in Siraatsu Castle

Stats from the in-game Bestiary. Weak to = takes extra damage from that type.

Connected areas

Ancient Worldbridge