Steam achievement reference
Order of the Sinking Star Achievements
All 32 Steam achievements, with published unlock conditions and late-game groups you can choose to reveal.
18 achievements have a Steam description. The other 14 have no published description; their unlock conditions remain unconfirmed here.
Opening a Gold Room, activating an Antipode teleporter and finishing a campaign are separate milestones. Read the action stated for your achievement.
Reading the names
H = Heroes · M = Mirrors · S = Skipping Stones · B = Beamcasters. “HxM” means Heroes and Mirrors. The full world names and six pairings are explained in Worlds & Combined Mechanics.
32 of 32 achievements match
Late-game groups start collapsed. Selecting a group, condition or search term reveals matching entries.
Initial campaigns4 achievements
Skipping Stones
Steam unlock description
Finish the initial Skipping Stones campaign.
Skipping Stones map →Gold Rooms6 achievements
Antipode6 achievements
Antipode HxB
Steam unlock description
Activate the HxB teleporter to the Antipode.
World combinations →
Antipode HxM
Steam unlock description
Activate the HxM teleporter to the Antipode.
World combinations →
Antipode HxS
Steam unlock description
Activate the HxS teleporter to the Antipode.
World combinations →
Antipode MxB
Steam unlock description
Activate the MxB teleporter to the Antipode.
World combinations →
Antipode MxS
Steam unlock description
Activate the MxS teleporter to the Antipode.
World combinations →
Antipode SxB
Steam unlock description
Activate the SxB teleporter to the Antipode.
World combinations →High worlds4 achievements · reveal
High Skipping Stones
Unlock condition unconfirmed. Steam currently gives no description.
Puzzle index →Low worlds6 achievements · reveal
Ascend & Descend2 achievements · reveal
Endgame3 achievements · reveal
Completion1 achievement · reveal
No achievements match. Try a shorter name or reset the filters.
How to use this reference
Names, descriptions and icons come from Steam’s global achievement list, checked on 11 October 2026. Categories on this page help you browse; they are not a required playing order. An empty description does not establish whether an achievement is hidden. This reference does not provide a complete unlocking route or read your Steam account.
Our game-file checks establish achievement identities and some static region associations. The full trigger and counting logic has not been verified, and the local snapshot’s Steam build number is unknown. Those associations are not used to fill blank unlock descriptions.
Missing achievements after bringing over Demo progress? See the progress and carry-over notes.
Sources
- Steam: all 32 achievements and their published descriptions
- Game files: achievement identities and static associations
Updated 2026-10-11. Version limits are noted beside the advice they affect.