Sephiria Achievement Tracker: Tick Off All 27, Saved Locally

Tick the achievements you already have and the tracker above does the bookkeeping: your completion percentage, the unlock that the fewest players are still missing, and — more usefully for planning — the one that the most players have managed, which is the statistically cheapest thing left on your list. Everything you tick is stored only in this browser; nothing is sent anywhere, and the Reset button wipes it.

What the percentages mean

Every figure is Steam's own global unlock rate: the share of all Sephiria owners who have earned that achievement, across the whole life of the game. It is a rolling statistic, so it drifts as new buyers start runs — a chapter achievement's rate falls slightly every sale week and climbs slowly afterward. This page re-reads the numbers from Steam every week and prints the capture date under the list, so a figure that disagrees with an older screenshot is not an error, just a newer read.

The rates form a clean difficulty ladder. On the 7 September capture the top of it is DIY (repair your house, 92.1%) and Stronghold Exploration (the Mole Chief, 90.7%); the bottom is Root's Retreat 30 (clear Hard Mode stage 30, 24.2%), with Seal and Journey's End at 28.1% just above it. That last trio is the one to read carefully: on the 12 August capture Journey's End was the rarest at 16.3%, and Root's Retreat 30 has since overtaken it — which says something about how many players finished the story in August and then stalled on the Hard Mode grind. The full list with the same numbers is on the achievements page, which also explains what the four blank-description bosses actually require.

Twelve achievements with no description

Twelve of the 27 ship with a name and nothing else — Chapter I through V, Where the Blue Being Lives, Qliphoth Contractor, Soul Plan, Hero's Guise, Temple of Evil, Seal and Journey's End. The tracker shows those as hidden achievement rather than inventing a condition. Where this site has established the condition from patch notes or play (the chapter achievements are story progression; Qliphoth Contractor is the mutated Askard fight documented on the bosses page), the achievements page says so; where it has not, it says that instead.

A sensible order

The tracker's "easiest next" suggestion is purely statistical, but it happens to match how most players actually clear the list. The first ten by rate are all story beats through Chapter II plus the three Early Access-era secrets (a hidden room for Traveler, the Pocket Dimension for Where the Blue Being Lives, the house repair for DIY) — none of them needs a build. The middle band, from Broken System (59.7%) down to Chapter IV (43.1%), is Chapters III and IV: this is where a run needs a real build route and a settled talent spread. The bottom seven are Chapter V, the ending pair, and the three Hard Mode tiers, and they are the reason the Hard Mode page exists.

Two practical notes from the patch record. If the ending achievement fails to fire, walk back into Bunnyville: 1.0.23 made the game retry the final achievement on entering town. And if you are chasing Root's Retreat tiers in co-op, remember that the 1.0.21 Blood Festival healing scale-down and the 1.0.26 temporary-HP rule both apply — the co-op page has the details.

What this tool is not

It does not read your Steam profile — you tick boxes by hand, which is why it works without logging in and why it cannot be wrong about what you own. If you want the same list with Steam doing the ticking, your own profile's achievement page does that; this tracker is for the planning part Steam's page lacks: which one next, and how far from 100% you are.