Bathysia is a free browser game — a deep-sea exploration game you play by hand, at the controls. Every creature, wreck and crystal field is found the same way: piloted, not clicked. Everything you find becomes idle exploration for your automated fleet, working the same water while you are gone.
plays in your browser, no download
Somewhere in The Lower Dark sits a fault the scope refuses to read — now a real, playable siege. Twelve strikes a day, five hard-gated walls, and a promise: paying can only move the day forward, never the wall.
Read the notes →A socket cut into a part, a graded stone to fit it, deterministic Fusion, and a +1–10 Refinement ladder with published odds. The whole system is real, tested and save-safe — and we're saying plainly that the cockpit console to actually touch it isn't built yet.
Read the log →Every dive now banks XP on one account-wide ladder to Level 100. Cross Level 5 and it isn't a menu — it's a bench lighting up at the Berth, three drone classes waiting, and a choice that's yours to make.
Read the notes →The Expedition Ledger is a real book now: thirty pages, each undiscovered creature held as a silhouette until you find it. Complete a page and its bonus is no longer a promise — it is wired straight into the fleet's stats, permanently.
Read the log →