Completion guide
Steam currently lists 27 Sephiria achievements. This guide groups the visible names into practical routes and keeps hidden descriptions separate when Steam does not expose a useful condition.
Official total
Steam Global Gameplay Stats lists 27 total achievements. The visible list includes house repair, chapter milestones, hidden-room discovery, named bosses, Hard Mode Stage 1 / 15 / 30, and late-game progression. Use Steam's own tracker as the final unlock state; this page is a planning index.
Route planning
Hidden conditions
Steam displays blank descriptions for several achievements, so an older guide or community walkthrough may describe a condition that changed after Early Access. Do not treat an old chapter route as a guaranteed current unlock; record the chapter, boss state and current patch when testing.
Source
Verify progress against the official Steam achievement page. It currently reports 27 achievements and exposes the visible names and percentages; hidden descriptions remain hidden by Steam where applicable.
Related guides
Use the boss guide for encounter names, the Hard Mode guide for Root's Retreat stages, and Pocket Dimension for the rare-location context.
Verification note
Last verified against the supplied Sephiria research set. Version-sensitive claims retain their source version; missing paths, compatibility details, and current balance values are marked To be confirmed rather than guessed. See the site's research sources for the full method.
