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 hoards 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!
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
- a message from Dr. Finn the Dolphin (who really needs your help because he’s too lazy to do the work himself)
Operation Octo
Klub Kofta StudioDeveloper
Klub Kofta StudioPublisher
July 2025Release
🎹🖱️ Keyboard + Mouse
🕹️ Partial Controller Support
🎮 Full Controller Support
🕹️ Partial Controller Support
🎮 Full Controller Support
Very Positive (64 reviews)
Public Linux Depots:
- [0 B]
Patch 1.0.3 - Operation Octo
Fixed a glitch where Watchdog\'s cost isn\'t capped at 60 pearls\n [/list]\n\nFixed a glitch where the \"Bottled Hollow\" shop item is displayed as a Mutant Elixir instead \n [/list]\n\n
Time for the post-release Patch :D\n\n(Full disclosure: It normally takes me a month to make a boss fight, but I had to make the Twilight Zone boss in 3 days. He needs A LOT of tweaking right now, and I intend to majorly rework him in the next few days!)\n\nIf you encounter any bugs while playing, please report them to me on Discord ! \n\n-------------------------------------------------------------------\n
Bug Fixes
\n(I am aware of several other issues you guys have reported - I will aim to fix them soon!) \n\nGameplay Bugs
\n- \n
- Fixed a glitch where Imitation Crab cannot transform into a Bubble Parrot \n[list]
- Reported by Lavauk
Achievement Bugs
\n- \n
- \"Salty Seadog\" achievement can no longer be acquired by not exiting a finished level\n
- Fixed a glitch where \"Salty Seadog\" achievement fails to unlock \n
- Fixed a glitch where \"Archeologist\" achievement does not unlock\n
- Fixed a glitch where \"Bountiful Harvest\" achievement does not unlock\n
- Fixed a glitch where \"Break Time\" achievement could be unlocked by stunning a Diver that\'s not drilling (but had reached max charge before)\n
Visual Bugs
\n- \n
- Fixed Twilight Zone vision shader issues on Linux / Steam Deck, when not running through Proton \n[list]
- Reported by Natlove
Misc Bugs
\n- \n
- Fixed a glitch where players could get stuck after Level 3-10\'s second-last wave \n
Misc Changes
\nAchievements
\n- \n
- \"Photomania\" achievement now requires 15 on-field Lantern Fish, instead of 10 \n
Level Adjustments
\n- \n
- Repositioned Level 3-10 Clam locations\n
- Reduced Level 3-10 enemies spawns later on\n[list]
- While 3-10 has been the highlight of many people\'s playthroughs, I\'ve also heard many say it is far too overwhelming. I\'m tuning down the number of skeletons that interfere with the player. The Clams have been repositioned to prevent certain optimal strategies.
- \n
- SPOILERS\n
- Dr. Kraxen will now hop towards the player at the start of his final phase\n[list]
- This is due to a bug report by TrulyAzul - Dr. Kraxen normally clears all the boulders near you at the start of phase 2, and I am apply this to phase 3 as well, in case any player got trapped.
- \n
- Some Twilight Zone Boss reworks\n[list]
- People are saying he\'s a lot more fun to fight now after the patch. I did some preliminary balancings - Will make him better yet in a day or two!
Misc
\n- \n
- Added more Twilight Zone Treat Bucket tips\n
- Added some alternate dialogues \n
[ 2025-09-16 09:51:19 CET ] [Original Post]
Minimum Setup
- OS: Ubuntu 18.04 or higher
- Processor: SSE2 instruction set supportMemory: 2 GB RAM
- Memory: 2 GB RAM
- Graphics: OpenGL 3.2 or higher
- Storage: 2 GB available spaceAdditional Notes: Unity 2D - Has option to disable shaders
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