Single-player games like Portal
Below are 19 single-player Steam games similar to Portal, 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 Portal page.
Ranked picks
- 1
Portal 2
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
- 2
Cubin
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Cubin is a first-person platform puzzle game that immerses you in the LGA experience. Complete 60 experiments to discover the truth about this simulation.
- 3
ChromaGun
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Welcome to ChromaTec’s test lab! You’re here to test our state-of-the-art military-grade color-technology: The ChromaGun (patent pending)! Use it to solve our meticulously designed test chambers by painting the walls and droids. Remember how to mix colors from pre-school? Then you qualify!
- 4
Quantum Conundrum
Single-player alternative to Portal — playable solo, no multiplayer required.
Find and rescue your uncle by using his newest invention to work your way through a crazy complex mansion as you switch between dimensions and solve puzzles!
- 5
Suicide Guy
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Suicide Guy is set in the incredibile and extraordinary dreams of its protagonist. What would you do in order to save the thing you love most? Immerse yourself into his weird dreams and help him to wake up before it's too late.
- 6
Suicide Guy VR
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Experience Suicide Guy now in Virtual Reality for the greatest, most immersive snooze! These surreal dreams have never been so chaotic and frantic. If you're faint of heart, do not play this game.
- 7
Bionic Bay
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
A scientist uses a unique teleportation instrument to escape an ancient biomechanical world filled with imaginative technology, deadly traps, and hidden secrets.
- 8
DEPLOYMENT
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
An intense competitive top-down shooter: choose your class, capture turrets, progress, and dominate in the arena. top-down shooter, multiplayer shooter, arena shooter, class-based shooter, sci-fi shooter
- 9
Superliminal
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Perception is reality. In this mind-bending first-person puzzler, you escape a surreal dream world through solving impossible puzzles using the ambiguity of depth and perspective.
- 10
The Witness
Single-player alternative to Portal — playable solo, no multiplayer required.
You wake up, alone, on a strange island full of puzzles that will challenge and surprise you.
- 11
Outer Wilds
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
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
Inscryption
Single-player alternative to Portal — playable solo, no multiplayer required.
Inscryption is an inky black card-based odyssey that blends the deckbuilding roguelike, escape-room style puzzles, and psychological horror into a blood-laced smoothie. Darker still are the secrets inscrybed upon the cards...
- 13
The Talos Principle
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
The Talos Principle is a first-person puzzle game in the tradition of philosophical science fiction. Made by Croteam and written by Tom Jubert (FTL, The Swapper) and Jonas Kyratzes (The Sea Will Claim Everything).
- 14
The Entropy Centre
Single-player alternative to Portal — playable solo, no multiplayer required.
Think in reverse. Outsmart the impossible. A mind-bending first-person adventure where you solve ingenious and complex puzzles by rewinding objects through time.
- 15
The Turing Test
Single-player alternative to Portal — playable solo, no multiplayer required.
The Turing Test is a challenging first-person puzzle game set on Jupiter’s moon, Europa. You are Ava Turing, an engineer for the International Space Agency (ISA) sent to discover the cause behind the disappearance of the ground crew stationed there.
- 16
Left 4 Dead 2
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Set in the zombie apocalypse, Left 4 Dead 2 is a co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.
- 17
Half-Life 2
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.
- 18
Half-Life
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
- 19
Half-Life: Alyx
Single-player alternative to Portal — playable solo, no multiplayer required. Shares Action with Portal.
Half-Life: Alyx is Valve’s VR return to the Half-Life series. It’s the story of an impossible fight against a vicious alien race known as the Combine, set between the events of Half-Life and Half-Life 2. Playing as Alyx Vance, you are humanity’s only chance for survival.