Single-player games like Remnants of R'lyeh
Below are 9 single-player Steam games similar to Remnants of R'lyeh, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Remnants of R'lyeh page.
Ranked picks
- 1
Why's It Getting DARKER?!
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Action and Indie with Remnants of R'lyeh.
The light is your only lifeline. Descend into a crushing, thalassophobic abyss where every photograph could be your last. Investigate unpredictable deep-sea horrors and explore the vast, dark unknown - all while being 'assisted' by a darkly sarcastic AI.
- 2
Seal The Breach
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Indie and Adventure with Remnants of R'lyeh.
A 3D survival experience set within a cramped one-man submarine exploring a hostile ocean trench.
- 3
We Need To Go Deeper
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Action and Indie with Remnants of R'lyeh.
DIVE. DISCOVER. DIE. Crew a submarine with friends in We Need To Go Deeper - a 2-4-player cooperative submarine roguelike set in a Verne-inspired undersea universe.
- 4
Abyss Crew
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Indie and Adventure with Remnants of R'lyeh.
Abyss Crew is a multiplayer coop game aboard a steampunk submarine. Each player is a member of the submarine crew - pilot, gunner, sonar, or engineer. Explore the abyss to find precious mineral - but beware, as sprawling menaces lurk in the darkness...
- 5
The Trench
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Action and Indie with Remnants of R'lyeh.
As captain of the Pandora sub, you must explore the Trench and retrieve data from the Neptune wreckage. But beware - the trench is home to unimaginable horrors that will test your courage. Can you survive the terrors of the deep and complete your mission, or will you become the next victim?
- 6
Subterror
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Action and Indie with Remnants of R'lyeh.
Explore abandoned biospheres at the bottom of the ocean, alone or with up to 4 friends.
- 7
Thief II: The Metal Age
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Action and Simulation with Remnants of R'lyeh.
The ultimate thief is back! Tread softly as you make your way through 15 new complex, non-linear levels full of loot to steal and guards to outsmart. Improved enemy AI, new gadgets and a riveting story will draw you into the world of Thief II: The Metal Age, a place of powerful new technologies, fanatical religions and corruption.
- 8
Diluvion: Resubmerged
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Action and Indie with Remnants of R'lyeh.
Diluvion is a 3D deep sea, Jules Verne inspired, exploration game with RPG elements and thrilling submarine combat. As the Captain of your own vessel, you must grow and manage your crew as you search for the secrets of the past in a hauntingly beautiful flooded world.
- 9
Cthulhu: Death Escape / 克苏鲁:死亡逃脱 Prototype
Single-player alternative to Remnants of R'lyeh — playable solo, no multiplayer required. Shares Action and Indie with Remnants of R'lyeh.
Trapped in an eerie dungeon, you must solve puzzles and evade lurking horrors to find the only chance of survival. Every step could lead you to freedom...or to your demise...