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Cosmobreeder Yiffai

Cosmobreeder Yiffai

Travel to a forgotten world and study alien creatures in this authentic retro metroidvania!

Released Apr 24, 2025 Developer KEMOSHOCO Platforms Windows Metroidvania2D PlatformerPlatformerRetroPixel Graphics
View on Steam ↗ $14.99 (US · as of 2026-05-18)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.

84.0%positive175 reviews
Recommended · 1 found this helpful

“It's a very well put together retro style game. The level and fight design is especially great, demanding that you understand your limits and work with them, not against them.”

— a player, Steam review · 16 hrs played
Recommended · 2 found this helpful

“This game is every bit worth playing without looking into the suspiciously horny title.”

— a player, Steam review · 39 hrs played
Not recommended · 2 found this helpful

“I genuinely tried to give Cosmobreeder Yiffai a fair chance. The sprites are great, the premise is fun, and I went in hoping for a spicy metroidvania with some retro charm. Instead, I got a game that feels like someone tried to recreate NES difficulty from memory after only ever…”

— a player, Steam review · 7 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 2026-09-26.

60achievements
24.6%median completion
3.7%rarest: One Tuff Pup
93.4% of players 82.4% of players 82.3% of players 79.6% of players 76.2% of players 74.9% of players 73.1% of players 68.8% of players 63.4% of players 63.1% of players 61.9% of players 55.3% of players 46.4% of players 45.7% of players 41.4% of players 40.9% of players 40.2% of players 39.5% of players 39.2% of players 39.2% of players 34.2% of players 33.9% of players 32.3% of players 30.2% of players 28.0% of players 26.3% of players 25.2% of players 25.0% of players 24.8% of players 24.7% of players 24.6% of players 24.1% of players 22.9% of players 22.1% of players 21.9% of players 20.9% of players 20.3% of players 20.0% of players 18.8% of players 17.5% of players 17.2% of players 16.7% of players 16.5% of players 16.5% of players 16.4% of players 16.2% of players 16.0% of players 16.0% of players 16.0% of players 16.0% of players 15.6% of players 14.7% of players 14.4% of players 13.3% of players 11.8% of players 11.8% of players 11.2% of players 10.3% of players 8.5% of players 3.7% of players 93.4% 0% most earned rarest
Almost everyone has
93.4%Special Item Collector: Bronze — Acquire a special item.
82.4%First Fight — Defeat the Bigbold!
82.3%Weapon Collector: Bronze — Acquire a weapon.
Rarest badges of honor
3.7%One Tuff Pup — Reach level 25,
8.5%Bounce-bounce! — Remain airborne for 20 seconds.
10.3%Completion: Gold — Reach 100% completion.

Latest official news

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

May 22, 2025
Update Notes for 1.0.5

- Fixed a bug that could trigger a persistent softlock on the final boss. If your save file was previously affected by this issue, then this update will automatically repair it.

May 10, 2025
Update Notes for 1.0.4

- minor menu edits

May 02, 2025
Update Notes for 1.0.3

- A bug causing the powered up psybomb to detonate early in some situations has been resolved - Physics bugs with the pushable crates fixed - Labels on the overworld and navmaps fixed - Enabled settin

Games like Cosmobreeder Yiffai

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

Lone Fungus Lone Fungus 84.2% · 860 reviews shares Metroidvania, Old School, 2D Platformer, Controller Gato Roboto Gato Roboto 94.4% · 2,600 reviews shares Metroidvania, Controller, Sci Fi, Platformer Owlboy Owlboy 83.0% · 4,088 reviews shares Metroidvania, 2D Platformer, Platformer, Retro Phoenotopia: Awakening Phoenotopia: Awakening 83.1% · 832 reviews shares Metroidvania, Combat, Sci Fi, Platformer Cave Story+ Cave Story+ 92.6% · 6,138 reviews shares Metroidvania, Sci Fi, Platformer, Retro Lost Ruins Lost Ruins 83.5% · 1,418 reviews shares Metroidvania, Sexual Content, Combat, Sci Fi Haiku, the Robot Haiku, the Robot 91.1% · 2,125 reviews shares Metroidvania, 2D Platformer, Controller, Platformer F.I.S.T.: Forged In Shadow Torch F.I.S.T.: Forged In Shadow Torch 86.8% · 781 reviews shares Metroidvania, Old School, 2D Platformer, Combat

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-26.

GenresAction, Adventure, Indie
Player tagsMetroidvania · 2D Platformer · Platformer · Retro · Pixel Graphics · Controller · 2D · Cute · Action · Story Rich · Multiple Endings · Dog (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Full controller support · Gamepad Recommended · DualShock Controller Support · Steam Cloud · Family Sharing
LanguagesEnglish
ControllerFull support
Achievements60
Minimum system requirements (PC)

Minimum: Requires a 64-bit processor and operating system OS: Windows 10, 11 Processor: 2.0 Ghz Memory: 2 GB RAM Graphics: 1 Gb Video Memory, OpenGL 3.0/GLSL 1.30 Storage: 200 MB available space