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Sluice is the developer name given to the unused arena of Yamori A, one of the unused colossi. The picture shows the area near the entrance to the arena.


It's unknown what the inside of the Sluice looked like, as the only pictures available of its location are of its entrance and the low resolution texture of B3. It featured unique-looking pillars along a pathway leading to a cave entrance.

The arena itself likely took place inside an underground cave, as it had textures similar to the light that comes out of the hole in Dirge's cave in the final version, and the texture segment named "sluice_sky_blind" suggests it had such a feature as well. It's also likely that it had a man-made structure inside it, as indicated by the texture segment named "sluice_inner", which lists a number of 'steel' and 'block' textures. The shape and size of the arena in the early B3 quadrant texture seems to match with Kuromori's oasis-like area before entering the temple leading to its Underground arena; whether this means that the Sluice was reused later to be part of Kuromori's arena or not is unknown.

The texture segment 'sluice_water' in the PS3 data sheets proves that the arena contained water, something that can also be inferred from its developer name, which references a water-sliding gate mechanism usually installed on water barrages and/or dams.


The arena was located on the west side of the Forbidden Lands, next to Lair to the West, at quadrant B3.[1]

The retail and preview versions of the game feature a pathway to the northern side of B4 leading up to a dead-end at B3, which might be a leftover of what used to be the path that led to the Sluice when it was still in the game.


  • This area was wrongly assumed to have been the name of the Beta Dam, but that was debunked when nothing between the two matched.
  • The chip data of Sluice and B3 match perfectly.
  • An object belonging to the Sluice named "sluice_rock" has the same textures as an object relating to Yamori A, named "izu_yamoriA_hill". Both of them only contain two textures, named "lb_iwahada" and "sz_tree_skin_buna02_mip".
  • The pillars from this area do not exist anymore in the final game. The ones next to the Lakeside are similar, but aren't the exact same.
  • The edge of a light beam can be seen on the image, it is likely pointing to Dirge's arena.


The Game Shadow of the Colossus ( Demo  · Pal Release  · Shadow of the Colossus HD  · PS4)
Characters Wander  · Agro  · Mono  · Dormin  · Emon
The Colossi I  · II  · III  · IV  · V · VI  · VII  · VIII  · IX  · X  · XI  · XII  · XIII  · XIV  · XV  · XVI
Unused Colossi ( Devil  · Evis  · Griffin  · Phoenix  · Roc  · Saru  · Sirius  · Spider  · Worm  · Yamori A  · Datamined Colossi)
Magic Sigil  · Hard Mode
Colossus Arenas Temple  · Proto  · Arena  · Kirin's Hill  · Canyon · Canossa  · Lakeside  · Underground  · Geyser  · Gravewind  · Leo's Cave  · Poseidon's Lake  · Desert  · Ruins  · Parthenon  · Sanctuary
Unused Arenas ( Badlands  · Cave  · Crater  · Devil's Plain  · Dune  · Hillock  · Labyrinth  · Sluice  · Stonehenge  · Valley )
The Forbidden Lands Shadow creaturesSave shrinesFruit treesWhite-tailed lizards

The Shrine of Worship
Umbral GladeStone Arch GorgeDried MarshNorthern SpanDesert FortressMisty FallsRavine EntranceHalf-moon CanyonWestern PlainRound Stone HillLair to the WestStone Bridge CliffCliff PathLair on the MesaWestern CapeArch Bridge PlainBlasted LandsAutumn ForestEastern BluffValley PlainSouthwestern CapeSouthern PlainGreen CapeThe Broken Seal

Soundtrack Roar of the Earth
Walkthrough Time AttackGolden Coins
Other media Nico  · Official artbook/guidebook  · Collectible figurines  · Film adaptation
Giantology campaign
Hoaxes Jebal-Barez skeletonTamil Nadu tsunami giantSulu Sea eel statuePolarneft conspiracySayre family vacation
Characters Eric BelsonCasper ShillingEd GuylerArkady SimkinBoris AtlasovAndrew and Ellie Sayre
Media Giantology podcasts (FirstInterview with Arkady SimkinThirdFourth) • IPICP memo
SotC Template CoverLogov2.png Walkthrough
Characters Wander  · Mono  · Agro  · Dormin  · Lord Emon  · Guards  · Shadow Creatures
Colossi I  · II  · III  · IV  · V · VI  · VII  · VIII  · IX  · X  · XI  · XII  · XIII  · XIV  · XV  · XVI
Locations The Forbidden Lands  · Shrine of Worship  · Colossus Arenas
Main Items Power-ups (Lizards · Fruit) · Weapons (Ancient Sword · Sword of the Sun · Queen’s Sword · Sword of Dormin · Bow & Arrow · Ancient Bow · Harpoon of Thunder · Life Sword) · Collectibles (Relics)
Gameplay Hard Mode  · Save shrines  · Time Attack  · Reminiscence Mode  · Watermellon  · Barrel
Media Roar of the Earth (OST)  · Official Art and Guide Book  · Nico Bonus DVD  · Film
Releases OPM Demo  · PS2 original  · PS3 remaster  · PS4 remake  · Credits
Early Builds Preview version  · PSU Preview version  · E3 Demo
Unused Content Unused Colossi  · Datamined Colossi  · Colossus Test Stages  · Unused Locations  · Beta Mountains  · Shadow of the Colossus Development Phases


  1. | Compilation of evidence found by the Stage 0 Team in order to prove Yamori A's location.