Order of the Sinking Star Achievements Guide

Track all 32 Steam achievements in the checklist below. Your checked state is saved in this browser. Hidden achievements are grouped by route, Antipode High, Antipode Low, and Endgame. Each card shows a concise objective; available buttons open a matching route or a related map/mechanics guide. Related guides provide context, not a room-specific solution. Descend remains unresolved. Steam hides the descriptions for 14 entries, so treat these researched conditions as community guidance, not official Steam wording.

For hidden High and Low achievements, use the hidden achievement puzzle solutions index. It lists every eligible puzzle and shows which records currently have full routes or verification notes.

Achievement checklist

Use each card to keep a local progress mark. Public cards follow Steam’s current condition wording.

Follow the public Steam conditions

Steam currently reports 32 achievements. For the 18 visible entries, the checklist follows Steam’s condition text. For the 14 Steam-hidden entries, the checklist summarizes third-party trophy descriptions and puzzle-guide thresholds; those are attributed below and are not official Steam descriptions.

Group the conditions by what you need to do

World codes: H = Heroes, M = Mirror Isles, S = Skipping Stones, and B = Beamcasters. For example, HxM means the Heroes–Mirror Isles pair.

• Campaign: finish the named initial campaign. The community puzzle index identifies a final puzzle for each campaign; the card links directly to it.
• Gold: solve the listed prerequisite puzzle, then open the Gold Room for that world pair. These puzzle prerequisites come from WikiTactics; Steam only states the room objective.
• Antipode: activate the exact paired-world teleporter shown in the condition.
• Endgame: complete the Endgame.
• Completionist: finish every puzzle in the overworld.

How to use the public conditions

If a campaign achievement does not unlock, check the linked final puzzle for that campaign. Steam’s own wording remains “finish the initial” campaign; the specific puzzle association is from the community puzzle index.

The six Gold entries use paired abbreviations: HxM, HxB, HxS, MxB, MxS, and SxB. Solve the linked prerequisite puzzle, then open the Gold Room with the matching pair. Steam itself only states the room objective; the puzzle prerequisites are community-documented.

For each Antipode entry, match the exact world pair and activate that pair’s teleporter to the Antipode. Check the Steam label before choosing a teleporter so you do not swap one abbreviation for another.

Steam gives no room-by-room checklist for either goal, so use the exact milestone above as the completion target.

What the hidden-condition research establishes

Steam still hides the text for all 14 entries. A third-party trophy list documents the broad milestones for the High region entries, six Low teleporters, and both Endgames. The WikiTactics achievement index lists the puzzle sets and solve thresholds shown on the cards. Its about page says its maps come from game level data and that solutions are validated against reconstructed game rules; this describes that site’s method, not an official developer statement.

The Ascend route guide says to activate four marked puzzles after the first ending and enter the upward purple beam to reach Crossroads High. It reports an achievement trigger on a special marker in that sequence, but does not establish the exact tile. Descend remains unresolved: the public trophy list provides no useful detail beyond the name. Do not infer its trigger from the opposite-sounding name.

For any community-documented condition that does not unlock, note the precise room, world pair, teleporter, or endgame event and compare it with the map and areas guide and crossover puzzle guide. For water and lily-pad mechanics, see the Skipping Stones guide. The checklist is a local progress aid; it does not verify Steam unlock state.