Games like Project Unknown on Steam
For those who prefer not to search, lists of the most played, top deals and best free games like Project Unknown are available at the bottom of the page.
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Backrooms: Escape Together
A visually lifelike co-op horror for 1-6 people. Journey through 9 procedurally generated levels, using what's available to survive and progress deeper into the Backrooms.
Pacify
There is reportedly an evil inside that house. Something about an old funeral parlor offering a last chance to talk to their dead loved ones. Plus something about lights, laughter, a girl, missing people, etc... You know the same stuff everyone claims. Take a team, and check the place out.
Demonologist
Demonologist is a Co-Op horror game that can be played with at least 1 and up to 4 players. Your goal is to identify the type of evil spirit in cursed places and exorcise it using your equipment, either alone or with your team.
Phasmophobia
Phasmophobia is a 4 player online co-op psychological horror. Paranormal activity is on the rise and it’s up to you and your team to use all the ghost-hunting equipment at your disposal in order to gather as much evidence as you can.
Fear Therapy
Fear Therapy, is a multiplayer(1-4) and single player psychological horror game.Try to complete the quests and leave the horror house before it is too late! Satan getting angrier every second and nothing holding it back.
The Devourer: Hunted Souls
Play as a paranormal investigator in our hybrid between first person survival and psychological horror story game. Investigate a haunted forest with up to 5 players CO-OP, try to lift the curse, experience a tragic story and take decisions together. Will you survive or will you lose your soul?
Ghost Exile
Ghost Exile - is a cooperative horror from 1 to 4 players: when hunting for ghosts, you need to determine the type of ghost, carry out a ritual of exorcism and then the ghost can no longer harm anyone. Be careful! Hasty conclusions can lead you to a sad outcome.
Escape the Backrooms
Escape the Backrooms is a 1-4 player co-op horror exploration game. Traverse through eerie backrooms levels while avoiding entities and other danger to try and escape. Free content updates with new levels and game modes keep the community rewarded.
Emissary Zero
Co-op horror (1-4 players). You are sent to explore a mysterious building at night. Find the Moon and try to return alive.
SKIBIDI GYATROOMS
Skibidi Gyatrooms is a 1-4 player co-op horror game. You and the homies just fell into the Backrooms, you must out-GYAT the Skibidi Toilet with max rizz or get flushed. Expect cursed levels, and brainrot that’ll keep you on edge.
Lunch Lady
Lunch Lady is a 1-4 player online co-op survival horror game. The school final exams are coming up and the best idea you and your friends had was to steal the test answers. Find all 10 pages and don't get caught by the murderous Lunch Lady!
FURRY BACKROOMS
FURRY BACKROOMS is a cooperative game for a group of 1-8 players that combines the best ideas from the BACKROOMS and FURRY universes. Single mode is also available. You have to survive and find a way out before the FURRY catches up with you. Updates and various interesting things await you...
The Backrooms: Survival
Survival horror with roguelike elements. Explore randomized levels with different items and entities while trying to maintain your thirst, hunger, and sanity, ensuring a new experience every time. Play alone or with up to TEN friends online! Cross-platform multiplayer with Nintendo Switch.
Hellcoming
Hellcoming is a co-op horror survival game for 1-4 players, who need to clean large areas from hellish abomination with the help of special tools.
Dark Hours
Dark Hours is a co-op survival horror game for up to 4 players. Your heist has been disrupted by a supernatural event, and your team of robbers is now trapped with an evil entity. Forget your plan, your mission is to survive. Explore and cooperate to find a way out or hide and wish for daylight.
In Silence
In Silence is a multiplayer horror game. One player takes on the role of the monster who has hypersensitive hearing abilities and is almost completely blind. The other players(2-6) play as survivors, trying to escape or hunting the monster.
Chased by Darkness
Chased by Darkness is a 1-4 players co-op survival horror. Your mission is to face supernatural entities and banish them to the spiritual plane. Explore, fight enemies and don't let the darkness reach you.
Vade Retro : Exorcist
Vade Retro is a PvP exorcism game up to 4 player. Play as Demon and make your opponents go through hell, or join the exorcist team by choosing a specialty to save victims from the devil's grip in this action-packed experience.
Spectral Scream
Spectral Scream is a 1-4 player cooperative horror exploration game. Are you ready to face death in the maw of purgatory? Your goal is to find key items in each chapter and retrieve the orb. But be careful! Threatening and vicious creatures await you at every stage.
Content Warning
Film your friends doing scary things to become SpöökTube famous! (strongly advised to not go alone)
Most played games like Project Unknown on Steam
Take a look at the top games like Project Unknown that are currently attracting the largest player bases on the Steam platform, as of June 15th 2025.
1. Dead by Daylight
Similarity 66% Trapped forever in a realm of eldritch evil where even death is not an escape, four determined Survivors face a bloodthirsty Killer in a vicious game of nerve and wits. Pick a side and step into a world of tension and terror with horror gaming's best asymmetrical multiplayer. Dead by Daylight is a horror, multiplayer and survival horror game developed and published by Behaviour Interactive Inc.. Released on June 14th 2016 has received 797,216 reviews of which 630,223 were positive and 166,993 were negative resulting in a rating of 7.9 out of 10. The game has hit the top spot as the #1 most played game like Project Unknown, thanks to its 48,439 peak concurrent players over the last day.
7.9
630,223
166,993
48,439
players
2. R.E.P.O.
Similarity 60% An online co-op horror game with up to 6 players. Locate valuable, fully physics-based objects and handle them with care as you retrieve and extract to satisfy your creator's desires. R.E.P.O. is a horror, online co-op and multiplayer game developed and published by semiwork. Released on February 26th 2025 has received 185,642 reviews of which 179,154 were positive and 6,488 were negative resulting in an impressive rating of 9.5 out of 10. While seeing 39,619 players online at once in the last 24 hours, this game is currently ranked #2 among games like Project Unknown based on player count.
9.5
179,154
6,488
39,619
players
3. Left 4 Dead 2
Similarity 46% Set in the zombie apocalypse, Left 4 Dead 2 (L4D2) is the highly anticipated sequel to the award-winning Left 4 Dead, the #1 co-op game of 2008. This 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. Left 4 Dead 2 is a zombies, co-op and fps game developed and published by Valve. Released on November 16th 2009 has received 963,983 reviews of which 940,221 were positive and 23,762 were negative resulting in an impressive rating of 9.7 out of 10. While seeing 30,782 players online at once in the last 24 hours, this game is currently ranked #3 among games like Project Unknown based on player count.
9.7
940,221
23,762
30,782
players
4. Phasmophobia
Similarity 82% Phasmophobia is a 4 player online co-op psychological horror. Paranormal activity is on the rise and it’s up to you and your team to use all the ghost-hunting equipment at your disposal in order to gather as much evidence as you can. Phasmophobia is a horror, online co-op and multiplayer game developed and published by Kinetic Games. Released on September 18th 2020 has received 768,779 reviews of which 736,611 were positive and 32,168 were negative resulting in an impressive rating of 9.5 out of 10. With 13,083 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Project Unknown.
9.5
736,611
32,168
13,083
players
5. Dying Light
Similarity 46% First-person action survival game set in a post-apocalyptic open world overrun by flesh-hungry zombies. Roam a city devastated by a mysterious virus epidemic. Scavenge for supplies, craft weapons, and face hordes of the infected. Dying Light is a zombies, survival horror and horror game developed and published by Techland. Released on January 27th 2025 has received 457,632 reviews of which 435,687 were positive and 21,945 were negative resulting in an impressive rating of 9.4 out of 10. With 9,004 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Project Unknown.
9.4
435,687
21,945
9,004
players
6. Grounded
Similarity 40% The world is a vast, beautiful and dangerous place – especially when you have been shrunk to the size of an ant. Can you thrive alongside the hordes of giant insects, fighting to survive the perils of the backyard? Grounded is a survival, multiplayer and co-op game developed by Obsidian Entertainment and published by Xbox Game Studios. Released on September 27th 2022 has received 84,517 reviews of which 75,482 were positive and 9,035 were negative resulting in a rating of 8.8 out of 10. With 8,101 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Project Unknown.
8.8
75,482
9,035
8,101
players
7. Lethal Company
Similarity 63% A co-op horror about scavenging at abandoned moons to sell scrap to the Company. Lethal Company is a online co-op, horror and first-person game developed and published by Zeekerss. Released on October 23rd 2023 has received 487,160 reviews of which 473,422 were positive and 13,738 were negative resulting in an impressive rating of 9.6 out of 10. With 7,043 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Project Unknown.
9.6
473,422
13,738
7,043
players
8. Sons Of The Forest
Similarity 44% Sent to find a missing billionaire on a remote island, you find yourself in a cannibal-infested hellscape. Craft, build, and struggle to survive, alone or with friends, in this terrifying new open-world survival horror simulator. Sons Of The Forest is a survival, open world and multiplayer game developed by Endnight Games Ltd and published by Newnight . Released on February 22nd 2024 has received 253,546 reviews of which 222,495 were positive and 31,051 were negative resulting in a rating of 8.7 out of 10. With 6,543 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Project Unknown.
8.7
222,495
31,051
6,543
players
9. Dark and Darker
Similarity 42% An unforgiving hardcore fantasy FPS dungeon PvPvE adventure. Band together with your friends and use your courage, wits, and cunning to uncover mythical treasures, defeat gruesome monsters, while staying one step ahead of the other devious treasure-hunters. Dark and Darker is a early access, dungeon crawler and multiplayer game developed and published by IRONMACE. Released on June 07th 2024 has received 72,206 reviews of which 48,530 were positive and 23,676 were negative resulting in a rating of 6.7 out of 10. With 4,555 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Project Unknown.
6.7
48,530
23,676
4,555
players
10. The Outlast Trials
Similarity 65% Red Barrels invites you to experience mind-numbing terror, this time with friends. Whether you go through the trials alone or in teams, if you survive long enough and complete the therapy, Murkoff will happily let you leave… but will you be the same? The Outlast Trials is a horror, multiplayer and co-op game developed and published by Red Barrels. Released on March 05th 2024 has received 66,956 reviews of which 62,533 were positive and 4,423 were negative resulting in an impressive rating of 9.2 out of 10. With 3,501 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Project Unknown.
9.2
62,533
4,423
3,501
players
Best deals on games like Project Unknown on Steam
Discover fantastic savings with the best discounts on a variety of games like Project Unknown available on Steam right now, updated on June 15th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Project Unknown.
1. Ad Infinitum
Similarity 45% When reality is a nightmare, nightmares become real. In this psychological horror game, you fight the terrifying creatures invading your mind. Can you save your sanity? Ad Infinitum is a horror, action and psychological horror game developed by Hekate and published by Nacon. Released on September 14th 2023 has received 934 reviews of which 750 were positive and 184 were negative resulting in a rating of 7.6 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for games like Project Unknown.
7.6
750
184
-99%
34.99€
0.67€
2. The Beast Inside
Similarity 49% The Beast Inside is a unique, gripping twist on thriller and survival horror. Immerse in the story of long-buried secrets, personal tragedies, and madness. Play as two protagonists bounded by dark heritage. Combat the enemies, solve riddles and experience real terror in the 3D-scanned environment. The Beast Inside is a horror, adventure and first-person game developed and published by Illusion Ray. Released on October 17th 2019 has received 11,355 reviews of which 9,414 were positive and 1,941 were negative resulting in a rating of 8.1 out of 10. Thanks to its incredible 98% discount, this game is now the #2 best deal in games like Project Unknown.
8.1
9,414
1,941
-98%
24.50€
0.62€
3. The Blackout Club
Similarity 61% The Blackout Club is a first-person co-op horror game centered around a group of teenage friends investigating a monstrous secret beneath the skin of their small town. 1-4 players explore procedurally-generated missions against a fearsome enemy you can only see with your eyes closed. The Blackout Club is a horror, co-op and indie game developed and published by Question. Released on July 29th 2019 has received 2,847 reviews of which 2,214 were positive and 633 were negative resulting in a rating of 7.5 out of 10. Thanks to its incredible 98% discount, this game is now the #3 best deal in games like Project Unknown.
7.5
2,214
633
-98%
28.99€
0.68€
4. F.E.A.R. 3
Similarity 48% F.E.A.R. 3 delivers all the hallmarks that define the F.E.A.R. brand: terrifying paranormal experience, frenetic combat and a dramatic storyline. F.E.A.R. 3 is a fps, horror and co-op game developed by Day 1 Studios and published by Warner Bros. Interactive Entertainment. Released on June 21st 2011 has received 12,758 reviews of which 9,070 were positive and 3,688 were negative resulting in a rating of 7.0 out of 10. Currently offered at a significant 98% discount, this title has earned the #4 position in the best deals for games like Project Unknown.
7.0
9,070
3,688
-98%
19.99€
0.45€
5. Outlast 2
Similarity 49% Outlast 2 introduces you to Sullivan Knoth and his followers, who left our wicked world behind to give birth to Temple Gate, a town, deep in the wilderness and hidden from civilization. Knoth and his flock are preparing for the tribulations of the end of times and you’re right in the thick of it. Outlast 2 is a horror, psychological horror and survival horror game developed and published by Red Barrels. Released on April 24th 2017 has received 55,500 reviews of which 50,676 were positive and 4,824 were negative resulting in a rating of 9.0 out of 10. Currently offered at a significant 97% discount, this title has earned the #5 position in the best deals for games like Project Unknown.
9.0
50,676
4,824
-97%
19.50€
0.64€
6. Killing Floor 2
Similarity 43% In KILLING FLOOR 2, players descend into continental Europe after it has been overrun by horrific, murderous clones called Zeds that were created by rogue elements of the Horzine Corporation. 6-player Co-Op & 12-player VS Zed-slaughtering mayhem. Killing Floor 2 is a zombies, multiplayer and online co-op game developed and published by Tripwire Interactive. Released on November 18th 2016 has received 126,866 reviews of which 111,325 were positive and 15,541 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 97% discount, this title has earned the #6 position in the best deals for games like Project Unknown.
8.7
111,325
15,541
-97%
27.99€
0.86€
7. The Chant
Similarity 44% A single-player, third person horror action-adventure game set on a remote spiritual island retreat. To survive you must craft, fight, and escape the psychedelic horrors set loose when a spiritual ritual goes wrong and awakens a dimension of cosmic terror. The Chant is a survival horror, psychological horror and horror game developed by Brass Token and published by Prime Matter. Released on November 03rd 2022 has received 996 reviews of which 781 were positive and 215 were negative resulting in a rating of 7.5 out of 10. Currently offered at a significant 97% discount, this title has earned the #7 position in the best deals for games like Project Unknown.
7.5
781
215
-97%
24.99€
0.89€
8. Condemned: Criminal Origins
Similarity 40% What twists the mind of an ordinary human into a serial killer? Condemned: Criminal Origins is a horror, action and first-person game developed by monolith and published by SEGA. Released on October 29th 2012 has received 3,939 reviews of which 3,428 were positive and 511 were negative resulting in a rating of 8.4 out of 10. Currently offered at a significant 96% discount, this title has earned the #8 position in the best deals for games like Project Unknown.
8.4
3,428
511
-96%
9.99€
0.43€
9. Dead Island Definitive Edition
Similarity 43% Welcome to the zombie apocalypse experience of a lifetime – and now more beautiful than ever. Caught in the midst of an epic zombie outbreak on the tropical island of Banoi, your only thought is: Survive! Dead Island Definitive Edition is a zombies, open world and co-op game developed by Techland and published by Deep Silver. Released on May 31st 2016 has received 25,527 reviews of which 20,934 were positive and 4,593 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 96% discount, this title has earned the #9 position in the best deals for games like Project Unknown.
8.1
20,934
4,593
-96%
19.99€
0.89€
10. Unrailed!
Similarity 43% Unrailed! is a co-op multiplayer game where you have to work together with your friends to build a train track across endless procedurally generated worlds. Master random encounters with its inhabitants, upgrade your train and keep it from derailing! Unrailed! is a multiplayer, co-op and online co-op game developed by Indoor Astronaut and published by Daedalic Entertainment. Released on September 23rd 2020 has received 18,669 reviews of which 17,426 were positive and 1,243 were negative resulting in an impressive rating of 9.1 out of 10. Currently offered at a significant 95% discount, this title has earned the #10 position in the best deals for games like Project Unknown.
9.1
17,426
1,243
-95%
19.99€
1.08€
Free games like Project Unknown on Steam
Check out this fantastic list of free-to-play games like Project Unknown you can enjoy on Steam right now, updated on June 15th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like Project Unknown.
1. Dark and Darker
Similarity 42% An unforgiving hardcore fantasy FPS dungeon PvPvE adventure. Band together with your friends and use your courage, wits, and cunning to uncover mythical treasures, defeat gruesome monsters, while staying one step ahead of the other devious treasure-hunters. Dark and Darker is a early access, dungeon crawler and multiplayer game developed and published by IRONMACE. Released on June 07th 2024 has received 72,206 reviews of which 48,530 were positive and 23,676 were negative resulting in a rating of 6.7 out of 10. With 4,555 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Project Unknown.
6.7
48,530
23,676
4,555
players
2. SCP: Secret Laboratory
Similarity 61% Deep within a secure underground facility, a sudden containment breach allows many of the secured anomalies to escape from their chambers. Assist the Foundation in re-securing the facility, help the Insurgency in their goal to capture it, or wreak havoc as an SCP in a frantic bid to escape. SCP: Secret Laboratory is a free to play, multiplayer and horror game developed and published by Northwood Studios. Released on December 29th 2017 has received 214,309 reviews of which 195,923 were positive and 18,386 were negative resulting in an impressive rating of 9.0 out of 10. Thanks to its free to play tag and a daily player base of 3,252, this game has secured the #2 spot in the ranking of free games like Project Unknown.
9.0
195,923
18,386
3,252
players
3. Poppy Playtime
Similarity 40% You must stay alive in this horror/puzzle adventure. Try to survive the vengeful toys waiting for you in the abandoned toy factory. Use your GrabPack to hack electrical circuits or nab anything from afar. Explore the mysterious facility... and don't get caught. Poppy Playtime is a horror, free to play and singleplayer game developed and published by Mob Entertainment. Released on October 12th 2021 has received 98,914 reviews of which 84,113 were positive and 14,801 were negative resulting in a rating of 8.4 out of 10. Thanks to its free to play tag and a daily player base of 749, this game has secured the #3 spot in the ranking of free games like Project Unknown.
8.4
84,113
14,801
749
players
4. Dead Frontier 2
Similarity 47% Survival horror MMO. As one of the few survivors of the outbreak, you must scratch a living out of the decaying ruins of society. Scavenge for supplies, improve your skills, and trade with other players. All the while, keeping your eyes peeled for the infected lurking around every corner. Dead Frontier 2 is a free to play, multiplayer and survival horror game developed and published by Creaky Corpse Ltd. Released on July 15th 2019 has received 26,801 reviews of which 18,844 were positive and 7,957 were negative resulting in a rating of 6.9 out of 10. Attracting a solid base of 536 players due to its free access, this strategy game has achieved the #4 position in the best free games like Project Unknown.
6.9
18,844
7,957
536
players
5. Cry of Fear
Similarity 65% Cry of Fear is a psychological single-player and co-op horror game set in a deserted town filled with horrific creatures and nightmarish delusions. You play as a young man desperately searching for answers in the cold Scandinavian night, finding his way through the city as he slowly descends into madness. Cry of Fear is a horror, free to play and multiplayer game developed and published by Team Psykskallar. Released on April 25th 2013 has received 74,408 reviews of which 65,852 were positive and 8,556 were negative resulting in a rating of 8.7 out of 10. Attracting a solid base of 484 players due to its free access, this strategy game has achieved the #5 position in the best free games like Project Unknown.
8.7
65,852
8,556
484
players
6. No More Room in Hell
Similarity 49% The chances of you surviving this all out war of society and the undead are slim to none. Already, there are millions of the walking dead shambling about, searching for food to eat. There's no known cure. One bite can possibly end it all for you. However, you aren't alone in this nightmare. No More Room in Hell is a free to play, zombies and multiplayer game developed by No More Room in Hell Team and published by Lever Games. Released on October 31st 2013 has received 74,253 reviews of which 66,753 were positive and 7,500 were negative resulting in a rating of 8.9 out of 10. Attracting a solid base of 346 players due to its free access, this strategy game has achieved the #6 position in the best free games like Project Unknown.
8.9
66,753
7,500
346
players
7. Deceit
Similarity 41% Test your instincts at trust and deception in an action-filled, multiplayer first-person shooter. You wake up in unknown surroundings to the sound of the Game Master’s unfamiliar voice, surrounded by five others. A third of your group have been infected with a virus, but who will escape? Deceit is a pvp, multiplayer and horror game developed and published by World Makers. Released on March 03rd 2017 has received 93,027 reviews of which 73,606 were positive and 19,421 were negative resulting in a rating of 7.8 out of 10. Attracting a solid base of 245 players due to its free access, this strategy game has achieved the #7 position in the best free games like Project Unknown.
7.8
73,606
19,421
245
players
8. We Were Here
Similarity 45% Lost in a frozen wasteland and split up from your partner inside an abandoned castle, the only possession you have left is a walkie-talkie with a familiar voice on the other end. Can the two of you find your way out in time? We Were Here is a free to play, co-op and escape room game developed and published by Total Mayhem Games. Released on February 03rd 2017 has received 29,997 reviews of which 27,014 were positive and 2,983 were negative resulting in a rating of 8.8 out of 10. Attracting a solid base of 236 players due to its free access, this strategy game has achieved the #8 position in the best free games like Project Unknown.
8.8
27,014
2,983
236
players
9. PROJECT: PLAYTIME
Similarity 62% PROJECT: PLAYTIME is a Free-to-Play multiplayer horror game where six players attempt to create one giant toy while surviving a terrifying monster that roams the toy factory. A seventh player controls the monster and is given only one goal: Find and kill everyone. PROJECT: PLAYTIME is a multiplayer, horror and survival horror game developed and published by Mob Entertainment. Released on December 12th 2022 has received 50,077 reviews of which 39,289 were positive and 10,788 were negative resulting in a rating of 7.7 out of 10. Attracting a solid base of 163 players due to its free access, this strategy game has achieved the #9 position in the best free games like Project Unknown.
7.7
39,289
10,788
163
players
10. Dark Deception
Similarity 50% Death awaits you in Dark Deception, a story-driven first-person horror maze game. There's nowhere to hide & nowhere to catch your breath. Run or die - it's your choice. Trapped in a realm of nightmarish mazes with a mysterious woman, your only hope of survival is to find a way to escape. Dark Deception is a horror, free to play and multiplayer game developed and published by Glowstick Entertainment. Released on September 26th 2018 has received 21,231 reviews of which 18,879 were positive and 2,352 were negative resulting in a rating of 8.7 out of 10. Attracting a solid base of 130 players due to its free access, this strategy game has achieved the #10 position in the best free games like Project Unknown.
8.7
18,879
2,352
130
players