Single-player games like Protocol
Below are 13 single-player Steam games similar to Protocol, 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 Protocol page.
Ranked picks
- 1
Deus Ex: Mankind Divided
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action with Protocol.
You play as Adam Jensen, an experienced covert operative operating in a world that despises his kind: augmented humans. Choose from an arsenal of state-of-the-art weapons and augmentations to build your playstyle, and decide who you'll trust, to unravel a vast worldwide conspiracy.
- 2
Attack of the Earthlings
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Indie with Protocol.
Take on Galactoil, a comically dysfunctional intergalactic energy corporation, and its larger-than-life employees in a tactical-stealth game that fuses satisfying strategic gameplay and dark comedy in a quirky single-player story.
- 3
High On Life 2
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action and Adventure with Protocol.
An intergalactic conspiracy threatens the fate of humanity! Team up with a wide cast of talking alien guns as you shoot, stab, and skate your way through the exotic locales to take down the bad guys and save your favorite species (humans)!
- 4
Prey
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action and Adventure with Protocol.
In Prey, you awaken aboard Talos I, a space station orbiting the moon in the year 2032. You are the key subject of an experiment meant to alter humanity forever – but things have gone terribly wrong. The space station has been overrun by hostile aliens and you are now being hunted.
- 5
The Stanley Parable
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Indie and Adventure with Protocol.
The Stanley Parable is a first person exploration game. You will play as Stanley, and you will not play as Stanley. You will follow a story, you will not follow a story. You will have a choice, you will have no choice. The game will end, the game will never end.
- 6
Black Mesa
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action and Indie with Protocol.
Relive Half-Life.
- 7
Surgeon Simulator
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action and Indie with Protocol.
Surgeon Simulator is an over-the-top operation sim, stitching together pitch-black humour with life-saving surgery. Become Dr. Burke, a would-be surgeon with a less than conventional toolkit, as he performs procedures on patients including the Heavy from TF2! ...is that a hammer?
- 8
SHUT IN
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Indie and Adventure with Protocol.
SHUT IN is a dark comedy/psychological horror adventure game which explores depression and isolation by trapping you inside your own house. Explore a hostile home, solve puzzles, and withstand sarcasm from a rude and unreliable narrator. Idiot.
- 9
Loco Parentis / 孤女咒怨
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action and Indie with Protocol.
Surreal survival horror, where you alone or with a friend have to solve puzzles and try to survive in the endless entrance among the monsters
- 10
Noch
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action and Indie with Protocol.
Go alone (or with a friend) to find the girl who destroyed the world. An ominous surreal first-person adventure full of dangerous monsters and secrets of the deceased world
- 11
Aliens In The Yard
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action and Indie with Protocol.
The aliens have decided to steal the Earth's most precious artifacts: your backyard junk. Defend your backyard with fireworks!
- 12
Startup Valley Adventure
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Indie and Adventure with Protocol.
A tough divorce, getting fired from a job ... Why not make your life harder? Take on the role of a novice startup in Silicon Valley. Get ready to dive into…
- 13
Protocol VR
Single-player alternative to Protocol — playable solo, no multiplayer required. Shares Action and Indie with Protocol.
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