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Koi

Koi

KOI is an award-winning exploration adventure game that details the story of a small koi on a grand adventure

Released Feb 22, 2019 Developer Dotoyou Games Platforms Windows IndieCasualAdventureGreat Soundtrack
View on Steam ↗ $0.99 (US · as of 2026-05-15)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28.

82.1%positive168 reviews
Recommended · 0 found this helpful

“Cute game about fish saving a pond. :)”

— a player, Steam review · 2 hrs played
Read more reviews ↗

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-28.

19achievements
14.7%median completion
6.6%rarest: Like a Fish in the Water
39.1% of players 37.0% of players 29.9% of players 24.1% of players 24.0% of players 22.0% of players 20.3% of players 17.6% of players 17.0% of players 14.7% of players 11.8% of players 11.5% of players 9.3% of players 9.1% of players 7.9% of players 7.7% of players 7.4% of players 6.7% of players 6.6% of players 39.1% 0% most earned rarest
Almost everyone has
39.1%Went the Distance — Total distance traveled over 8000 meters
37.0%Papa Fish — Lead more than 50 small fish in total
29.9%Flashy — Make an opened flower light up 30 times
Rarest badges of honor
6.6%Like a Fish in the Water — Avoid being hit by a single spark in Level 6
6.7%Scales in All Colors — Unlock all the Skins
7.4%Stalker — Remain undiscovered by the Black Fish in Levels 2 and 5

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Jun 18, 2025
BackSlap is Now Available!

We are thrilled to announce that our new game BackSlap is now officially released! Priced at just ​ ​ ​ ​$1.99​ , enjoy a ​ ​10% launch discount​ ​ during the first week. BackSlap is the ​ ​ultimate i

Oct 21, 2023
"Breaking Box: Rush!" released, "Koi" on limited-time promotion

"Breaking Box: Rush!" released, "Incredible Mandy" starts limited-time promotion. "Koi" on limited-time promotion at a discount of 50%. https://store.steampowered.com/app/1001070/Koi/ We are thrilled

Sep 22, 2023
"Breaking Box" is participating in the "Steam Curator Conference 2023" event!

We are excited to announce that our game Breaking Box are participating in the "Steam Curator Conference 2023" organized by the Steam China platform! During the "Steam Curator Conference 2023," Breaki

Jul 27, 2022
Updates

Fixed a star colleting bug in Level8

May 30, 2022
Update Notes

Fixed unlock achievements bug, change 24 hours achievement to 2 hours.

Games like Koi

From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.

UNDEFEATED UNDEFEATED 88.3% · 4,198 reviews shares Great Soundtrack, Adventure, Casual, Indie Plants vs. Zombies GOTY Edition Plants vs. Zombies GOTY Edition 98.2% · 45,975 reviews shares Great Soundtrack, Adventure, Casual, Indie Shatter Shatter 93.1% · 979 reviews shares Great Soundtrack, Adventure, Casual, Indie Braid Braid 91.6% · 5,542 reviews shares Great Soundtrack, Adventure, Casual, Indie Caster Caster 77.0% · 1,504 reviews shares Great Soundtrack, Adventure, Casual, Indie Trine Enchanted Edition Trine Enchanted Edition 94.4% · 6,023 reviews shares Great Soundtrack, Adventure, Casual, Indie Trine 2: Complete Story Trine 2: Complete Story 94.8% · 8,590 reviews shares Great Soundtrack, Adventure, Casual, Indie Faerie Solitaire Faerie Solitaire 91.0% · 1,713 reviews shares Great Soundtrack, Adventure, Casual, Indie

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-28.

GenresAdventure, Casual, Indie
Player tagsIndie · Casual · Adventure · Great Soundtrack (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Full controller support · Steam Cloud · Remote Play on TV · Family Sharing
LanguagesEnglish, Japanese, Simplified Chinese, Traditional Chinese, Korean
ControllerFull support
Achievements19
Minimum system requirements (PC)

Minimum: OS *: Window 7 sp1 Processor: 2.0 Ghz Memory: 2 GB RAM Graphics: 128mb Video Memory, capable of Shader Model 2.0+ DirectX: Version 9.0c Storage: 2 GB available space Sound Card: Any