Akatori Underwater Section Walkthrough

The Underwater section closes the Akatori demo’s biome trilogy with a tense shift in rules: gliding is disabled, an oxygen meter replaces aerial freedom, and environmental hazards punish greedy combat. After vertical mastery in Bamboo Location, Mako descends into flooded caverns beneath the bamboo islands—corridors patrolled by Amber-corrupted aquatic creatures, bubble vents for partial refills, and staff hook anchors on cave ceilings. This guide routes the demo underwater segment with breath thresholds, optional stealth, combat minimalism, and links to Traversal moves swimming rules plus the full Demo walkthrough for what follows (serpent chase and Bumblebee boss).

Monk Forest taught combat; Bamboo taught momentum; Underwater teaches restraint. Chapter One prologue players encounter different environments—see Chapter One for Takatsugu prep without underwater mechanics.

Core underwater rules

Rule	Implication
Oxygen meter	Depletes constantly; surface bubbles and vents refill
No glide	Plan hook routes instead of mid-water jumps
Slowed attacks	Favor staff throw pokes over aerial juggles
Stealth optional	Some patrols can be bypassed
Environmental hazards	Currents, spikes, and crush zones

Confirm swim-up binding on Keyboard controls or Controller layout before entry—panic ascends kill more players than enemy DPS according to community impressions.

Section 1 — Entry dive

Transition cinematic or shaft drop places Mako in shallow pool:

1. Tutorial prompt explains oxygen UI—watch top bar, not just health.
2. Swim forward using direction; press jump to rise toward air pocket.
3. First bubble vent teaches stand-in refill—full restore when activated.

Rule of thumb: ascend at 50% breath when learning; 25% only after route memorization.

Section 2 — First patrol corridor

Two fish-type enemies patrol horizontally.

Stealth route: hug ceiling hook anchors, hook across above patrol line.

Combat route: staff throw from distance, recall, retreat to vent—one enemy at a time.

Avoid Combat combo aerial chains; underwater recovery lag invites second aggro.

Section 3 — Current tunnel

Water current pushes Mako toward spike wall unless you hook opposing anchors in sequence:

1. Hook anchor A against current.
2. Release into eddy pocket.
3. Hook anchor B upward to vent platform.

Missed hooks dump you into spike damage—practice timing on Traversal page hook section first if needed.

Section 4 — Split path

Demo offers upper stealth vs lower combat branch reuniting at exit gate:

• Upper: fewer enemies, tighter oxygen budget, more hook precision.
• Lower: extra vent and medicine shard if elites defeated cleanly.

Speedrunners take upper; first-timers may prefer lower vent safety.

Section 5 — Deep chamber

Largest room combines patrols and environmental storytelling—Amber corruption visible on coral-analog props reinforcing Firebird Temple lore tied to Mako’s quest against Amber Storms in the full August 2026 release.

Strategy:

• Mark vent locations on mental map before engaging.
• Use dodge primarily for iframe through narrow spike gaps, not spam in open water.
• Finisher ground enemies near vents only—long finisher animation drowns careless players.

Section 6 — Ascent exit

Final vertical swim shaft:

• Chain hook anchors upward.
• Last vent before surface at 40% breath recommended.
• Surface transition triggers serpent chase setup in Demo walkthrough—ensure health and medicine stock before cinematic handoff.

Breath management chart (learning values)

Segment	Suggested entry breath
Entry pool	100%
Patrol corridor	≥70%
Current tunnel	≥60% after vent
Deep chamber	≥80% (use vent first)
Ascent shaft	≥50%

Values vary slightly by patch—adjust after one learning run.

Combat vs stealth philosophy

Underwater punishes Combat combo greed learned in Monk Forest and Bamboo. Treat staff as ranged poker and hook as primary movement—same staff, different tempo. This mindset helps Takatsugu the Sentinel later where patience beats mashing.

Common deaths

• Fighting two enemies away from vents.
• Forgetting swim-up while hooking horizontally.
• Chasing finisher animation into depleted oxygen.
• Ignoring current tunnel anchor order.

After underwater

Demo continues with high-speed serpent chase and Bumblebee boss—not underwater. Review Demo walkthrough Phase 6–7 before attempting clean demo completion.

Full release speculation

Store pages promise diverse realms across eras; underwater breath mechanics likely return in full campaign with upgrades (extended lung capacity, swim dash). Demo section previews core tension without upgrade crutches.

Preparation checklist

• Confirm swim-up and hook bindings
• Full health entering section
• Medicine optional but recommended for deep chamber
• Read serpent chase summary in Demo walkthrough before surface exit

Return to Walkthrough hub or Getting Started for broader wiki navigation.