How to Unlock All Achievements in Order of the Sinking Star

Unlocking achievements in Order of the Sinking Star requires journeying through four regional campaign hubs, unlocking hybrid crossover rooms, and conquering late-game layers.

The title offers 32 achievements on Steam, opening with 18 visible objectives that mirror the world structure. Venturing outward from the central Crossroads allows players to complete the four founding campaigns: heading North to The Hearty Heroes of Hauling, East into Mirror Isles, West across The Promise for Beamcasters, and South into Skipping Stones to Lonely Homes.

As regional campaigns advance, six Gold Rooms open where pairs of regions meet, each identified by world initials (H, M, S, and B). Unlocking these chambers and triggering their associated teleporters rewards the six Antipode milestones. Completing the initial overworld sequence yields the Endgame achievement, while finishing every puzzle in the overworld delivers the Completionist reward.

An additional 14 hidden milestones trace the second stage beyond the primary Endgame. These concealed tasks involve reaching each world's sector of Antipode High, activating six teleporters in Antipode Low, and completing the Second Endgame alongside the Final Endgame.