Single-player games like ZERO PROTOCOL
Below are 18 single-player Steam games similar to ZERO 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 ZERO PROTOCOL page.
Ranked picks
- 1
JANISSARY: ECLIPSE
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
A first-person survival RPG set in a sealed-off Crimea, overrun by the Stained: zombies that run on sunlight. They sprint in daylight. After dark they go blind and hunt by sound. You wake up bandaged, memory gone, stuck between two armies. Pick a side or burn it all down.
- 2
Eternity's Echo: Patient Zero
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
As Rayne Williams, an elite agent of the D.I.B you were deployed into the zone. Your team is missing and you're surrounded by both paranormal nightmares and mercs. Guided by your partner Sam, you must survive this chaos and uncover the mystery of "Patient Zero".
- 3
Unseen Beings
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
Unseen Beings is a short survival horror game where you avoid or confront invisible entities while exploring, solving puzzles, and overcoming horrors to to pay off your debt. Use special goggles, a taser gun, and your wits to survive the night.
- 4
Dracula Awakens
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
Kill monsters using your camera and solve puzzles as you try to survive Dracula himself in his castle in this retro-style survival horror game.
- 5
Fossilfuel 2
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
Turn up the volume, turn off the lights, and get ready for the definitive Jurassic survival horror experience. Pump your shotgun and put those dinos back where they belong... in the ground!
- 6
My Friendly Neighborhood
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
Something scary is happening with everyone's favorite Saturday morning puppet show, The Friendly Neighborhood! Play as Gordon, a repairman sent to get to the bottom of this disturbing dilemma. Fend off puppets and solve puzzles in this survival horror adventure.
- 7
35MM
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required.
Post-apocalyptic story about two travelers who set out on a long journey in the wasteland, left by people after the global epidemic.
- 8
NEDRA
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
NEDRA is a story-driven, atmospheric action-adventure blending survival horror with cosmic terror. Set in a Soviet-era Antarctic station, all the explorers have vanished without a trace, leaving you to uncover the chilling truth.
- 9
Resident Evil
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
The game that defined the survival-horror genre is back! Check out the remastered HD version of Resident Evil.
- 10
System Shock
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
A first-person fight to the death in the depths of space!
- 11
System Shock 2: 25th Anniversary Remaster
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
System Shock® 2: 25th Anniversary Remaster is a genre defining experience that established innovative game-play mechanics that are a staple of the FPS and RPG genre today. Survive the wretched corridors of the Von Braun. Your training has prepared you for this.
- 12
SILENT HILL 2
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
Investigating a letter from his late wife, James returns to where they made so many memories - Silent Hill. What he finds is a ghost town, prowled by disturbing monsters and cloaked in deep fog. Confront the monsters, solve puzzles, and search for traces of your wife in this remake of SILENT HILL 2.
- 13
Re:Red
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Adventure with ZERO PROTOCOL.
Stay on the path, Little Red. Spot anomalies in an uncanny, looping forest to reach Grandma’s house with your basket of goodies intact. If safe, press forward. If not, turn back immediately. Trust your paper map, explore strange new areas, and most of all, watch out for the Big Bad Wolf.
- 14
REPLIKATOR
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
In this twin stick roguelite shooter, you play as one of the galactic mercenaries, explore a mysterious scientific complex and uncover the secret of the REPLIKATOR project.
- 15
INSPACE 2980
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
INSPACE 2980 is a stylish and dynamic SHMUP from the 16-bit era of games consoles and arcade machines. Take part in an exciting adventure and save the galaxy! Once again!
- 16
Iron Dungeon
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action with ZERO PROTOCOL.
Iron Dungeon combines a twin-stick shooter, a 2d platformer and a roguelite. Explore a dangerous underground complex in search of dozens of weapons, gadgets and upgrades to find a way to the surface and find out if there is still life on Earth!
- 17
WATERPUNK
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
A roguelite action game inspired by the legendary Enter the Gungeon and Nuclear Throne, set in a post-apocalyptic aquatic world. Shape your strategy by choosing which abilities shine by day and which awaken at night.
- 18
SYSTEM INTRUDER
Single-player alternative to ZERO PROTOCOL — playable solo, no multiplayer required. Shares Action and Adventure with ZERO PROTOCOL.
Dive into the atmospheric dread of classic 3D games. Unravel the dark secrets of the ASGARD-04 research complex in this gripping, narrative-driven retro-cyberpunk survival horror.