planktOs — Steam capsule
Steam capsule · 460×2152.14 : 1

planktOs Free Download

by Blot Interactive

Windows · Feb 2, 2016

Download Now Data checked on Steam: Oct 20, 2026
Fit check

Is planktOs worth it for you?

We tell you who should skip it, too.

Play it if you…

Good fit
  • Players who prefer underwater exploration and environmental puzzles
  • Puzzle fans interested in abilities tied to marine life
  • Adventure players drawn to a journey centered on rescuing trapped Elders

Skip it if you…

Saves you a refund
  • Players seeking a game focused on combat systems may find the described exploration and puzzle activities less suited to that preference.
  • Players who prefer a setting without predators or traps may find these hazards a poor fit.
  • Players looking for a racing or sports game may prefer a different genre.

Drafted from Steam store data with AI and reviewed by an editor · How we write fit checks · Report an error

Our take on planktOs

Possession and cleansing marine life sit at the center of this underwater exploration experience. The player controls a small spirit navigating the realm, discovering fish abilities and solving puzzles while working to release trapped Elders. This gives the journey a rescue focus within its aquatic setting.

What is planktOs?

Explore an underwater world where Elders are held in crystal prisons.

A small spirit travels through the marine realm, possessing and cleansing fish affected by an unknown evil. Different forms of marine life have unique abilities that can contribute to puzzle solving. Progress involves discovering these abilities, avoiding predators and traps, and finding ways to release the imprisoned Elders. The game combines exploration, puzzles, fish possession, and a rescue journey in a mysterious aquatic setting.

How planktOs plays

01Fish possession
The spirit can take control of different marine animals and cleanse them of corruption.
02Marine abilities
Distinct fish abilities contribute to puzzle solving and navigating the realm.
03Crystal rescues
The exploration centers on freeing Elders held inside crystal prisons.
04Environmental hazards
Predators and traps pose dangers while the spirit searches the underwater realm.

Games like planktOs

Casual

Lastone: Behind the Choice

Great Conspiracy TheoryWin · 2022For:Visual novel fans who want character stories tied to match-based progressionSkip if:Players seeking an expansive role-playing system may find the game centered on point-and-click matches and story progression.
Casual

Harpoon

Laush StudioWin · 2022For:Players who enjoy top-down shooters set underwaterSkip if:Players seeking a story-led adventure may find the focus on shooting, waves, and scores too limited.
Casual

Beerd leaver

Jero53motoxWin · 2018For:Casual players who want a short, hazard-focused journeySkip if:Players seeking complex progression or a large game world may reach the limits of its simple journey structure.
Casual

Demonlisher

Strategy FirstWin · 2014For:Casual players who want a short-form action adventure with structured levelsSkip if:Players seeking an expansive world beyond three environments and 52 levels

Picked by overlapping fit notes and genres, not an editorial comparison.

planktOs: platforms & release

Is planktOs worth it?

It is worth it if: players who prefer underwater exploration and environmental puzzles. Skip it if: players seeking a game focused on combat systems may find the described exploration and puzzle activities less suited to that preference.

Where can I download planktOs?

Use the Download Now button on this page: it opens planktOs's store page, where you can choose how to get it.

What platforms is planktOs on?

Windows only.

Keep looking

More casual

3,200 games →

Platformity

Win · 2022

Dream Walker

Win · 2018
planktOsWindowsDownload Now
planktOsWindows
Download Now