Single-player games like Mark of the Deep
Below are 16 single-player Steam games similar to Mark of the Deep, 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 Mark of the Deep page.
Ranked picks
- 1
Death's Door
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
Reaping souls of the dead and punching a clock might get monotonous but it's honest work for a Crow. The job gets lively when your assigned soul is stolen and you must track down a desperate thief to a realm untouched by death - where creatures grow far past their expiry.
- 2
Rogue Waters
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with Mark of the Deep.
Rogue Waters is a Pirate Tactical Turn-Based Rogue-lite. Play as Captain Cutter, commanding your ship and crew through procedurally generated encounters to seek revenge. Recruit, train, and upgrade crew, use powerful sea creatures, and engage in dynamic naval and melee combat to gain the upper hand.
- 3
TUNIC
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with Mark of the Deep.
Explore a land filled with lost legends, ancient powers, and ferocious monsters in TUNIC, an isometric action game about a small fox on a big adventure.
- 4
Dark Devotion
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
Explore the secrets of a mysterious fallen temple and put your Templar faith to the test in Dark Devotion, where no sacrifice is too great in praise of your God.
- 5
Somber Echoes
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with Mark of the Deep.
Armed with God-given powers, the revived tribune Adrestia is given a second chance to save the universe from her maniacal twin sister. Find secrets, acquire upgrades, and dominate mighty foes through sheer combat prowess as you explore and conquer the horrors of the forsaken vessel Atromitos.
- 6
Dead Cells
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
Dead Cells is a roguelite, metroidvania inspired, action-platformer. You'll explore a sprawling, ever-changing castle... assuming you’re able to fight your way past its keepers in 2D souls-lite combat. No checkpoints. Kill, die, learn, repeat.
- 7
Hollow Knight
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
Forge your own path in Hollow Knight! An epic action adventure through a vast ruined kingdom of insects and heroes. Explore twisting caverns, battle tainted creatures and befriend bizarre bugs, all in a classic, hand-drawn 2D style.
- 8
Trinity Fusion
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
Three fractured realities. One collapsing multiverse. Fast, fluid combat in a dark sci-fi Roguevania where each run begins in a separate universe — then lets you fuse your parallel selves, powers, and worlds to create brutal, ever-evolving builds.
- 9
Subnautica
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Indie and Adventure with Mark of the Deep.
Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.
- 10
Hyper Light Drifter
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
Explore a beautiful, vast and ruined world riddled with dangers and lost technologies.
- 11
Outer Wilds
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with Mark of the Deep.
Named Game of the Year 2019 by Giant Bomb, Polygon, Eurogamer, and The Guardian, Outer Wilds is a critically-acclaimed and award-winning open world mystery about a solar system trapped in an endless time loop.
- 12
Dandy Ace
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
Dandy Ace is an over the top action game that follows this fabulous magician seeking to combine and use his magical cards, fighting and looting his way to defeat the Green-Eyed Illusionist and free himself from a cursed mirror.
- 13
No Heroes Here
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
No Heroes Here is a frantic co-op game for 1 to 4 players, available in local and online modes. Craft and use several items effectively whilst coordinating your ragtag band of non-heroes to defend castles and survive! ...Oh, as well as saving the Kingdom in the meantime!
- 14
Monica e a Guarda dos Coelhos
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
MONICA E A GUARDA DOS COELHOS is a couch co-op game for 1 to 4 players. Playing as a group with heroes from the Brazilian IP Monica and Friends, everyone must play a role and defend the castles!
- 15
Latarnix Puzzle
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required.
Help the boar Latarnix as he passes through a variety of puzzles with obstacles to reach delicious golden apples at the end of each of the 50 levels in the game.
- 16
No Heroes Here 2
Single-player alternative to Mark of the Deep — playable solo, no multiplayer required. Shares Action and Indie with Mark of the Deep.
A group of non-adventurers is the last hope in defending the castle in this chaotic co-op tower defense game with roguelike features. With up to 4 players, your party must organize the castle, work as a team to craft ammo, and shoot at enemies to protect your kingdom!