📸 SiNiSistar 2 screenshots

Image source: official Steam screenshots (Uu / Eroge Japan)

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SiNiSistar 2 Area Guide: Six Progression Groups and Revisits

The official store describes six dungeons. Here, locations documented by player records are organized into six progression groups. Some English place labels come from player records rather than a complete check of official UI labels.

Documentary check and update: 2026-10-17

Scope: the Steam release of 15 May 2026. This is a documentary guide comparing the official store, official achievement definitions and dated player records. It does not certify the installed current build, every enemy weakness, fixed drops or every branch. Features from another edition or an external patch are not assumed to behave identically in standard Steam play.

Six progression groups

Open details — progression and encounter spoilers

Group	Action	Related target	Next check
Vampiric Swamp	An early objective; check the piercing-arrow ability before the boss.	Swamp Abomination Broodling	After learning the ability, check lines of fire and obstructions worth revisiting.
Demihuman Lair	Another early objective; events at the hub or town after its boss also advance the route.	Demihuman Abomination Broodling	Distinguish the first visit from a later movement-magic detour.
Northeast Village	A destination after the town conversations; check mechanisms and the exploding-arrow ability.	A priest encounter leads toward the cathedral key	Do not confuse obtaining the key with completing every optional request.
Valley and Innard Cave	Repair the bridge to reach the cave and look for the connection into the cathedral underground.	Stomach Abomination Broodling	Check the next door's required key before leaving.
Cathedral underground and approach	Move toward the surface and distinguish the movement-magic detour from the route inside.	Enenuth Mother and Backstab	Keep a separate save before killing it if you want to attempt the rear approach.
Cathedral interior and summit	Link the dining hall, library, treasure room, support conversations and ingredients to the ritual.	Otherworlder / optional Seere	Finish ingredient, travel and recovery preparations and decide on detours before committing.

When a route is blocked

Show or hide section

Blocker	Check	Distinction
Obstruction	Before repeating the same attack, check acquired piercing, exploding and movement magic.	Not every wall is certified as using the same ability.
Locked door	Match the cathedral-key pickup with the intended entrance.	Do not substitute an unrelated conversation or boss defeat for actually holding the key.
Bridge	Check the carpenter request and updated conversations.	Do not assume movement magic bypasses every bridge requirement.
Supporting character	Review the cathedral book, hub conversation and bridge request in order.	Do not assume holding ingredients skips all dialogue gates.

Revisits and pickups

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The official description includes revisiting cleared dungeons and rematching bosses. Recovering a condition tied to an initial defeat or every missed collectible is a separate question. Check conditions such as Backstab before committing.

Player-made maps and screenshots from guides are not reproduced. Direction and entrance descriptions reflect the cited evidence scope rather than a measured coordinate map of the current build.

Frequently asked questions

Where should I begin?

Check the hub objective and current abilities before taking the swamp or lair route. Swamp first is a player suggestion based on an ability unlock, not the certified sole order in every edition.

How should I revisit a blocked detour?

Check keys, piercing arrows, movement magic and updated conversations separately. Review the rear approach for Backstab before killing its target and retain a separate save.

Does this list every official English dungeon label?

No. The six entries are editorial route groups and include player-supplied place labels. Every official UI name and edition difference has not been checked.