Dive deep below into fathoms lost to the ages in your submarine! Build up your incremental/idle research lab and uncover the mystery at the very bottom of the sea!
Lost Fathoms is a an experimental game mixing a mouse-only submarine simulation game with an additional strategic idle/incremental layer. The anomalies you uncover help you develop your lab, which over time will provide you the resources needed to improve your submarine.
From deep below a signal hails. Distorted messages come and go. Will you catalogue or be catalogued? Your world is ending. 12 minutes remain.
CONTROLS:
Mouse only!
- The submarine will follow your cursor. Try to keep it close to the window's edges!
- Press & hold left mouse button to buy upgrades.
- Left mouse click does everything else.
Credits:
Project Leader, Narrative, and Gameplay Designer:
Alex the Abyssal Novelist
Programming:
RafaelaOverflow
Art, Sound, and Music
Rabbit_Speaks
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Date added
Friday, January 16th, 2026 at 8:02:39 AM GMT+00:00
January 16th, 2026
Original release date
Monday, January 12th, 2026 at 12:00:00 AM GMT+00:00
