Here is the full list of all 20 Gates of Horn and Ivory achievements.
Granted for playing the game at 12 a.m.
Activated the orange artifact.
Activated the purple artifact.
Activated the blue artifact.
Activated the green artifact.
Activated the white artifact.
Reach the outer world.
Read all signs during a single playthrough.
Activated the yellow artifact.
Your intentions are unclear.
A speedrun skip named after our beta tester.