Screenshots
Watch trailer on Steam ↗Tethyscope
Chris Madsen · Published by Chris Madsen
1 user reviews — 100% positive (1 reviews) · 10 achievements
Last updated 28 Sept 2026
Explore our planet's ocean to discover animals, plants, and shipwrecks. Take photographs to document your findings and sell them to fund upgrades to your submarine.
£2.65
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Indie, Simulation, Early Access, Casual · 2026 · More under £5 games
About this game
Have you ever wanted to explore the depths of the ocean?
In this submarine simulator, realistic ocean floor bathymetry is home to a range of flora and fauna. Take photographs and sell them to upgrade your submarine - the more species in your photos, the more they are worth!
Observe and record different varieties of animals in your catalogue - an albino blue whale, a giant Japanese spidercrab, and many more...
PLEASE NOTE: I have not yet uploaded a version of TethyScope that works for older machines that do not support Vulkan (modern graphics API). I believe computers newer than 2013 should have support for Vulkan. If you purchase TethyScope and are unable to play it due to this issue, please contact me for a full refund.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: Intel Core i5-4460 / AMD Ryzem 3 1200
- Memory: 4 GB RAM
- Graphics: NVIDIA GTX 750 Ti / AMD Radeon R7 260X
- DirectX: Version 11
- Storage: 1 GB available space
- Sound Card: DirectX-compatible
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10 or 11 (64-bit)
- Processor: Intel Core i5-9600K / AMD Ryzen 5 3600
- Memory: 8 GB RAM
- Graphics: NVIDIA GTX 1660 / AMD Radeon RX 580
- DirectX: Version 11
- Storage: 1 GB available space
- Sound Card: DirectX-compatible
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
v.0.9.5 Mythological creatures abound!
You've heard legends and tales of mysterious creatures in the vast ocean... perhaps seeking booty from shipwrecks will shed some light on these stories - are they fantastical inventions from the minds of sailors too long adrift, or could there be some truth to these fables...?Read full article on Community Announcements (c.Flow)Patch NotesOfficial
Steam Cloud Saves
Steam clouds saves now enabled; these are unique to each operating system, so if you save your TethyScope progress on a Mac, you will be able to access that save file from any other Mac, but not from a Windows machine, etc.Read full article on Community Announcements (c.Flow)Patch NotesOfficial
v.0.9.4 Predators and Prey, icebergs, sunken treasure
New Creatures: 5+ new creatures to discover, spread across ecosystems and depths Environmental Features: Icebergs Predator / Prey Interactions: blue whales, killer whales, and sharks now munch their prey Achievements Adjustment: Achievements requiring ‘All’ of some type of morph (e.g. ‘see ALL giant creatures’) now require only 15 distinct creatures. Pirates and Booty: Ships and treasure lurk in the deep, waiting to be found... Fixes: Spawning odds fixed for ocean-floor critters, yeti crabs now discoverableRead full article on Community Announcements (c.Flow)Patch NotesOfficial
Minor bug fix: Leaderboards
Updates / bug fixes: Leaderboards will now update with your most expensive photograph and the number of creatures you have photographed. Collector page now displays fauna names even before you have discovered them in the wild. This should make it more feasible to find unknown creatures. Three new creatures added to the depths...Read full article on Community Announcements (c.Flow)
