Otherworld Labyrinth — Complete Dungeon Guide
The Otherworld Labyrinth (異界迷宮) beneath Hirasaka Academy is the central dungeon spanning 5 layers. Based on early access reviews (A9VG 8.5/10), each layer features unique art themes, enemy rosters, and escalating puzzle complexity.
⚠️ Phantom Poison System（幻素中毒）
Each labyrinth entry begins with a 1,000-capacity Phantom Bottle. Killing enemies and collecting materials fills the bottle with "Phantom Essence." When full, the bottle has a high chance of shattering, inflicting a severe debuff: continuous HP drain that cannot be healed.
Phantom Essence is also a valuable resource — spend it to unlock inventory slots, purchase NPC interaction points, and activate new game mechanics. The system encourages multiple exploration runs rather than clearing an entire layer in one go.Pro tip: Spend your Essence before the bottle hits 800+ capacity.
Layer 1 — Entrance to the Otherworld
Early Game (Ch.1-2)The tutorial layer. Introduces basic 2D platforming, enemy types, and the transition between 2D exploration and 3D boss combat. Simple layout with few branching paths — ideal for learning the combat fundamentals.
Shadow Wisps, Lesser Golems
Guardian Warden (Tutorial Boss)
Basic combat, first Talisman acquisition
Layer 2 — The Winding Paths
Early-Mid (Ch.2-3)Introduces multi-route layouts. Side paths contain Memory Shards and Elemental Cores for Soul Board upgrades. First appearance of breakable walls concealing hidden treasure rooms.
Corrupted Samurai, Flame Wisps
Oni General (Fire-element)
Breakable walls, branching paths, fire traps
Layer 3 — The Mechanical Depths
Mid Game (Ch.3-4)Where the labyrinth truly comes alive. Features portals, spike traps, hidden chests requiring wall jumps or double jumps, looping shortcuts, and environmental puzzles (fireball-activated walls). This is where Metroidvania elements fully emerge.
Automata Knights, Phase Spiders, Dark Wisps
Ancient Automaton (Earth-element)
Wall jumps, double jumps, portals, spike traps, fireball puzzles
Layer 4 — The Sunken Sanctuary
Late Game (Ch.4-5)Water-themed layer with flooded sections requiring specific Soul Board abilities to traverse. Underwater combat areas and pressure-plate puzzles. Some areas can only be accessed by backtracking with abilities learned in deeper layers.
Abyssal Knights, Water Serpents, Corrupted Priestesses
Leviathan's Shade (Water-element)
Underwater combat, pressure plates, ability-gated areas, current puzzles
Layer 5 — Heart of Xanadu
End Game (Ch.5-Finale)The final and largest layer with the most complex layout. Combines all previous mechanics plus new challenges. Elite enemies guard the path to the final boss. Secret rooms require mastery of all traversal abilities. The Phantom Poison limit is at its strictest here.
Eclipse Guardians, Royal Guard Automata, Dimensional Stalkers
Final Boss (Multi-phase)
All mechanics combined, elite gauntlets, multi-phase boss
📢 Detailed Maps Coming Soon
Full floor-by-floor maps with treasure chest locations, Memory Shard positions, secret room entrances, and boss arena layouts are being documented as player data emerges. Bookmark and check back — we update daily!