idle koi! — Steam game overview

Stored observation / content update: 2026-10-25T06:25:37.000Z

Hatch koi eggs, breed unique bloodlines, evolve rare traits, and send 3-koi teams into idle battles. Build a living collection where genes, rarity, lineage, and battle growth decide every koi's value.

Game metrics below are stored observations; missing values are unknown.

Revenue is modelled, not confirmed sales. See the methodology and uncertainty range.