The Centipede emote in Ink Game appears to be an AFK World reward, not a normal shop emote. A public wiki entry lists its obtainability as 300 AFK and a Reddit post discussing the emote matches that AFK-world context.

How to get it

  1. Enter the game’s AFK World.
  2. Stay long enough to earn 300 AFK.
  3. Spend that AFK currency on Centipede once it shows up in the AFK emote list.

What to watch for

  • It is not described as a standard coin shop purchase like most other emotes.
  • Availability may change if the game updates its AFK rewards or emote rotation.

Quick note

If you were checking the regular emote shop, that’s probably why you didn’t see it; the sources point to AFK World as the route for Centipede.