How to Unlock All 32 Steam Achievements in Order of the Sinking Star
Unlocking all 32 Steam achievements in Order of the Sinking Star requires completing four regional campaigns, mastering hybrid Gold Rooms, and conquering deep second-stage layers.
Initial Regional Campaigns and Visible Milestones
Order of the Sinking Star contains 32 achievements on Steam, opening with 18 visible milestones that trace the shape of the game itself. Venturing outward from the central Crossroads allows players to finish the four founding campaigns — following our optimal route to navigate regions and choose progression order: heading North into The Hearty Heroes of Hauling (walked through in our guide to solve Heroes Together party puzzles), East toward Mirror Isles, West across The Promise for Beamcasters, and South into Skipping Stones to Lonely Homes. Completing each world's initial campaign unlocks that region's primary milestone.
Gold Rooms and Antipode Teleporters
Pairing the four territories yields six Gold Rooms labeled by regional initials: HxM, HxB, HxS, MxB, SxB, and MxS (detailed in our guide on how to access and solve all Gold Rooms). Six rooms account for every two-way pairing across the four worlds. Resolving each crossover puzzle unlocks its internal teleporter to the Antipode, granting six companion Antipode achievements. Conquering the initial campaign sequence culminates in the first Endgame milestone.
Second Stage and Hidden Goals
An additional 14 hidden milestones trace the late-game second stage after the first Endgame. The Ascend milestone marks the climb up to Crossroads High, unlocking four High achievements for reaching each regional sector in Antipode High. Moving downward, the Descend milestone leads into Antipode Low, which contains six Low objectives awarded by engaging regional gateway portals. Concluding this multi-layered progression requires finishing Endgame High to conquer the second campaign climax, followed by Endgame Low to wrap up the ultimate final conclusion.
Completionist and Overworld Cleanup
The Completionist milestone demands solving every single puzzle across the entire overworld, encompassing more than 1,000 hand-crafted puzzles. Completionist covers every puzzle in the overworld and should be the last achievement earned, so leave it until all other objectives are finished. If demo players encounter missing achievements upon transitioning to the launch release, loading saved files retroactively awards earned milestones.