Single-player games like Security 51
Below are 15 single-player Steam games similar to Security 51, 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 Security 51 page.
Ranked picks
- 1
Shift At Midnight
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie and Simulation with Security 51.
An online co-op detective horror for up to 3 players. Work together across randomly generated shifts to investigate your customers, as some are only pretending to be human. Make one mistake, and you’ll be forced to board up, set traps, and hide.
- 2
Beholder: Conductor
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie and Adventure with Security 51.
A Beholder series spin-off. Become a conductor of the Determination Bringer train: monitor passengers, report incidents, and carry out important Ministry assignments — whose level of secrecy depends only on your loyalty. And remember: mission success is very important to you!
- 3
Chicken Police: Into the HIVE!
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Adventure and Simulation with Security 51.
A wild tale of conspiracy, loss, friendship, and... chickens?! Two rooster detectives are about to venture into the insect underworld to uncover a worldwide conspiracy, while also battling their inherent demons in this animal noir adventure satire.
- 4
Static Dread: The Lighthouse
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie and Adventure with Security 51.
Lovecraft meets Papers, Please. Play as a lighthouse keeper and guide ships safely into the harbor using your radio. Survive the presence of something impossible, and don’t let the shadows consume you!
- 5
The Operator
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie and Adventure with Security 51.
Welcome to the FDI. As our newest Operator, your role is to use your detective skills to assist our field agents and investigate mysterious crimes. Use cutting-edge FDI software to dig for clues, solve puzzles, and uncover the truth.
- 6
Pyramids and Aliens: Escape Room
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Adventure with Security 51.
Embark on an archaeological adventure inside an ancient pyramid to find your missing mentor. As an intrepid explorer, solve puzzles, investigate clues, and unravel the pyramid's secrets. Spoiler: it was not built by humans!
- 7
Saturnalia
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Adventure with Security 51.
A Single-Player Survival Horror Adventure: play as a cast of characters exploring an isolated village haunted by an ancient ritual—but beware, its labyrinthine roads will change each time you lose all your characters.
- 8
TR-49
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Adventure with Security 51.
A World War II computer. An archive of lost books. A world-changing secret. Narrative deduction meets audio drama, from the creators of Overboard!, Heaven's Vault and A Highland Song.
- 9
Wall World
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie and Adventure with Security 51.
Explore the mysterious Wall World on your giant robospider: mine for valuable resources, upgrade your equipment to fight off hordes of monsters, and discover exotic biomes in-between attacks. Will you be able to survive and learn the secrets of the Wall World?
- 10
Necrosmith
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie and Adventure with Security 51.
A necromancer simulator. Assemble the dead using different body parts while upgrading your tower, combine the abilities of the different fantastic races to fight your way through the hordes of enemies and overrun the ’chosen ones’. To tell the truth, the dead are pretty, uhm, dumb.
- 11
Karate Survivor
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie with Security 51.
Become a martial arts master in this survivor-like roguelite inspired by action movies of the ‘80s. Use your fists, feet, and the environment to fight off relentless thugs. Master powerful combos, enhance your skills, and remember: everything around you is a weapon!
- 12
Wall World 2
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie and Adventure with Security 51.
The adventure in the mysterious world of the Wall continues! Pilot your robospider into its depths, uncover lost artifacts and technologies, upgrade your exosuit and spider, and battle the horrors lurking in the dark. Unravel the mysteries buried in the depths of the Wall!
- 13
Necrosmith 2
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Indie and Adventure with Security 51.
Like a dead man reanimated by dark sorcery, the necromancer simulator is back! Give the undead the ability to fly over mountains and swim across rivers, explore a fully generated world at night and fend off enemy hordes during the day. Start a new, uhm, life.
- 14
They Always Run
Single-player alternative to Security 51 — playable solo, no multiplayer required. Shares Adventure with Security 51.
Become Aiden, a three-armed mutant who hunts the most dangerous bounties in the galaxy. Catch, slice, dice and destroy enemies in this exciting 2D platformer with a space-western setting.
- 15
The Happy Hereafter
Single-player alternative to Security 51 — playable solo, no multiplayer required.
Welcome to The Happy Hereafter, a casual sim in which you guide the newly dead as they build an afterlife for themselves and their fellow lost souls. There will be no rest for the wickedly funny as you put them to work building a village to rival Paradise!