Operation Octo

Operation Octo

Klub Kofta Studio · September 10, 2025 · Tower Defense, Strategy, Underwater, Survival, Cute

Buy Operation Octo from Steam at $6.99 — the cheapest of 1 store we compare.

PC
Very Positive98% · 1241playing now
Best price
$6.99
lowest tracked $4.19
Steam Buy at Steam

Prices last checked

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Where to buy Operation Octo — official stores

Steam
Steam
Standard Edition · Steam
$6.99
Buy

Operation Octo price by region

Operation Octo costs £5.89 in the United Kingdom, €6.89 in Europe (EUR), $6.99 in the United States, $6.99 in Georgia (USD), CA$8.99 in Canada, A$10.25 in Australia, NZ$10.49 in New Zealand, R$23.50 in Brazil and zł31.99 in Poland right now.

Cheapest Operation Octo offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Kingdom £5.89 £5.89 — 1
Europe (EUR) €6.89 €6.89 — 1
United Statesyour region $6.99 $6.99 — 1
Georgia (USD) $6.99 $6.99 — 1
Canada CA$8.99 CA$8.99 — 1
Australia A$10.25 A$10.25 — 1
New Zealand NZ$10.49 NZ$10.49 — 1
Brazil R$23.50 R$23.50 — 1
Poland zł31.99 zł31.99 — 1

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About Operation Octo

✦ AI summary

Operation Octo is an action tower defense game where you strategically place sea creature turrets to defend against hordes of skeletal enemies across underwater biomes, with the twist that you'll need to dodge for your life when your defenses crumble. Unlock and upgrade creative turrets like the Pistol Shrimp and Navy Seal, face off against skeleton pirates and dragons, and enjoy 7-9 hours of gameplay across three unique environments with free biome updates coming soon.


Dr. Odin, an octopus scientist, has teamed up with his Dolphin colleague to put a stop to underwater skeletons’ reign of terror!

In this action Tower Defense game, you fend off hordes of skeletons by strategically placing sea creature turrets. Beware that as your line of defense falls, this quickly turns into a game of survival where you dodge around for dear life!

The game currently has 7-9 hours of playtime across 3 unique biomes, with more biomes to be added via free updates!

Features

  • Unlock Turrets: Your arsenal is filled with mechanized sea lives! Those cool inventions (such as Pistol Shrimp, Navy Seal, and Death Ray) will handle the fight. You’ll discover new turret types one after another - Figure out how best to utilize each of ‘em!
  • Skeleton Enemies: Did you know that most humans who ever lived are dead? Tons of skeletons end up in the ocean, and are terrorizing local ecosystems. Fight sword-swinging pirates, poison-wielding chemists, and even skeletal dragons… Those skeletons are sure to shake up your playstyle at every turn!
  • Unique Biomes: As you adventure the seven seas, you’ll add more creatures into your turret collection, and face new and exciting dangers. Adapting to changing environments is key to survival: Don’t misstep into a toxic brine pool, or forget your light in the darkness of the deep sea.
  • Turret Upgrades: Skeletons will sometimes drop a variety of Elixirs. Use them to boost turrets into different forms! Will you turn a turret into a frosty ice machine, a powerful mutant, or a shadowy stealth weapon?
  • Boss Fights: Special levels featuring larger-than-life boss enemies with formidable abilities!
  • Awesome Upbeat Soundtrack: Seriously, the composers are amazing
  • Mostly created by one person, while doing college


“The ocean awaits us to reclaim - Let the Operation Octo commence!”
- a message from Dr. Finn the Dolphin (who really needs your help because he’s too lazy to do the work himself)

Operation Octo — game info

Platforms
Windows, macOS, Linux / SteamOS
Player modes
Single-player
Controller
Full controller support
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Sep 10, 2026
mmm fish
Recommended Sep 8, 2026
genuinely fun. i really like it.
Recommended Aug 21, 2026
DISABLE HEALTH REGENERATION in the settings I thought this game was kinda bleh and overwhelming, until i turned that toggle on and suddenly all the systems started to make sense.
Recommended Aug 21, 2026
This is a really fun game, as someone who likes tower defense games, this I approve of! Though may I ask, can it get a Nintendo Switch Port please? This feels like it would fit well on Switch and I'd most certainly buy it and play it on Switch as I'm a big time Switch player!
Recommended Aug 12, 2026
I recommend
Recommended Aug 6, 2026
This game is amazing and I can't wait for the full game to be done.

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