76%Strong matchIron Lung
92%8k92% positive reviews, Very Positive across 8k reviews·Horror · Atmospheric
—






Command an advanced submarine in a heart-pounding horror experience as you hunt the last remnants of a defeated enemy beneath the Mariana Trench. Can be completed in under 50 minutes.
Their Navy is Their Doom is a chilling horror game that puts you in command of an advanced combat submarine.
Immersive submarine control through tactile cranks, levers, and buttons.
Navigate treacherous waters, launching torpedoes to obliterate enemy vessels while fighting for survival.
Uncover the terrifying secrets lurking in the ocean's darkest depths .
A concise, intense experience designed to be completed in under 50 minutes.

Plunge into the abyss beyond the Mariana Trench, tasked with eradicating the last vestiges of the Republic's forces.
Over five harrowing days, you'll navigate using sonar and tactical displays, engaging enemy ships in deadly underwater combat.
Due to the experimental nature of your vessel and limited resources, you'll enter cryosleep during descents to uncharted depths.

THE STORY
As Commander Kenji Nagai of the Federation, you stand at the precipice of history.
The Federation has triumphed in the land war, driving the Republic's leadership to flee with their remaining naval forces through a covert passage drilled deep beneath the Mariana Trench. You helm one of the few cutting-edge submarines dispatched to deliver the final blow. To withstand the crushing pressure of extreme depths, you must rely on cryosleep as your vessel auto-navigates the perilous descent.
The fate of the world rests in your hands, Commander Nagai.

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
All matches
Finding similar games…
Iron LungShares First-Person · Psychological Horror · Sci-fi , adds Submarine92% · 8k positive reviews76%Strong match—
NarcosisShares First-Person · Psychological Horror · Lovecraftian , adds Underwater76% · 1k positive reviews71%Strong match—
Under: Depths of FearShares Action-Adventure · First-Person · Psychological Horror , adds Historical65% · 244 positive reviews71%Strong match—
Murky DiversShares Action-Adventure · First-Person · Psychological Horror , adds Funny87% · 3k positive reviews72%Strong match—
DarkwaterShares Action-Adventure · First-Person · Sci-fi , adds Online Co-Op78% · 1k positive reviews75%Strong match—
SubnauticaShares First-Person · Sci-fi · Survival Horror , adds Open World Survival Craft97% · 380k positive reviews69%Strong match—All matches
The best games like Their Navy Is Their Doom are Iron Lung, Narcosis, Under: Depths of Fear, Murky Divers, and Darkwater.
Match on: filter matches for Their Navy Is Their Doom by tag
Filters all matches
65%+Strong matches
50%+Good matches