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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MetaPhysical

Supernatural phenomena are on the rise. In MetaPhysical you and up to 5 other friends can go on the hunt for eerie creatures to put an end to their sinister activities! Whether it's an ordinary ghost or a demon, your task is to identify the rumbling creature and then finish it off.

Similarity 57%
Price 14.79€
Rating 7.6
Release 09 Dec 2023

Half Dead

Half dead is a multiplayer sci-fi game about a violent TV show. The players' goal is to survive in a network of rooms full of traps.

Similarity 57%
Price 1.99€
Rating 7.6
Release 01 Aug 2016

Conrad Stevenson's Paranormal P.I.

I made this first-person single player ghost hunting simulation game, trying to take an authentic approach at investigating ghosts. Use essential paranormal tools to help your community alleviate their concerns and put their minds at ease.

Similarity 57%
Price 14.79€
Rating 8.8
Release 28 Sep 2023

At Dead Of Night

At Dead Of Night is part horror film, part horror game and part ghost hunt. It blends live-action and graphics to create a unique immersive horror experience like no other.

Similarity 57%
Price 15.79€
Rating 9.0
Release 19 Nov 2020

Scauage

Scauage is a short horror experience where you play as a scavenger looting an abandoned house, uncovering its dark secrets and collecting hidden treasures while facing what lurks within.

Similarity 56%
Price Free to play
Rating 8.5
Release 06 Dec 2024

Dead by Daylight

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.

Similarity 56%
Price -60% 7.90€
Rating 7.9
Release 14 Jun 2016

UNLOVED

Based on the community award-winning Doom2 mod with the same name by the same creator, UNLOVED is reimagined in the Unreal Engine 4 to bring forth the unspeakable terror in new ways. Play coop with your friends, increase your skills, mod your weapons and face the horror that this unearthly place holds...

Similarity 56%
Price 3.99€
Rating 7.1
Release 29 Sep 2016

SILENT BREATH

Unpredictable horrors lurk around every corner, forcing you to find the missing people while desperately clinging to survival. In this experience even your own mind can become your enemy. Stay vigilant and keep your voice hushed, or risk becoming another victim of the forest's darkness

Similarity 56%
Price 9.75€
Rating 7.1
Release 05 Apr 2024

Backrooms Society

Backrooms Society is a 1-8 player co-op horror game. Make your way through unique levels of the backrooms while trying to survive and avoid mysterious entities. Scavenge each level for gear and resources, bring it back to The Hub where you can sell valuables and buy/craft new gear.

Similarity 56%
Price 6.89€
Rating 7.3
Release 19 Jun 2023

White Noise Online

A fully cooperative horror experience like never before! On White Noise Online, a team of up to 4 investigators has to explore an area looking for clues, while avoiding being devoured by a supernatural creature. Will you be able to uncover the truth behind the mysterious events?

Similarity 56%
Price 4.99€
Rating 6.4
Release 22 May 2014

Slender: The Arrival

Slender Man returns more terrifying than ever. You're on your own. No one to help you. No one to hear you scream. Relive the horror all over again with cutting edge visuals for the 10th Anniversary Update and experience survival horror at its finest.

Similarity 56%
Price -40% 11.70€
Rating 8.6
Release 28 Oct 2013

Secret Neighbor: Hello Neighbor Multiplayer

Hello Neighbor Multiplayer. Secret Neighbor is a Multiplayer Social Horror Game where a group of intruders try to rescue their friend from the Neighbor's creepy basement. Only problem is one of the intruders is the Neighbor in disguise.

Similarity 55%
Price 19.50€
Rating 8.5
Release 24 Oct 2019

Visage

Visage is a first-person psychological horror game. Explore a mysterious ever-changing house in a slow-paced, atmospheric world that combines both uncannily comforting and horrifyingly realistic environments, and enjoy a genuinely terrifying experience.

Similarity 55%
Price 29.99€
Rating 8.3
Release 29 Oct 2020

Stay Close

Stay Close is open-world horror game, with options for single-player and co-op. It has an unique and new gameplay approach unseen so far in any other game. You'll find yourself in a creepy and anomalous town, what is your next move?

Similarity 55%
Price 8.79€
Rating 6.1
Release 14 Oct 2016

Blood and Bacon

This Co-op Shooter , has Day and Night levels, multiple maps, players will take on 25 enemy types and numerous bosses, like Gargantuan Monsters and Minibosses every 10 days as you explore, shoot and run for your life against the onslaught of porcine monstrosities.

Similarity 55%
Price 0.99€
Rating 9.3
Release 01 Feb 2016

Cry of Fear

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.

Similarity 55%
Price Free to play
Rating 8.7
Release 25 Apr 2013

Sketchy's Contract

A 1-8 player co-op sci-fi looter horror game that takes place on a mysterious asteroid belt where players must complete contracts by traveling to exotic planets to kill creatures, find loot, and/or farm planetary materials that they must return to an ominous figure named Sketchy.

Similarity 55%
Price 8.79€
Rating 8.1
Release 09 Apr 2024

PANICORE

PANICORE is a survival horror game that mixes permadeath, AI monsters and a co-op experience up to 5 players (4 players in demo). Try to escape and don't get caught, but beware: they don't only hear your steps, but also your voice.

Similarity 55%
Price 4.99€
Rating 7.9
Release 31 May 2024

Supernormal

Inspired by Allison Road. SUPERNORMAL is a psychological horror game set in a seemingly ordinary apartment harboring dark secrets. Play as Detective Wyatt, tasked with unravelling the disappearance of Masato Sakamoto's daughter. Search for clues and unravel the sinister truth.

Similarity 55%
Price 7.79€
Rating 6.9
Release 08 Jan 2024

Lethal Company

A co-op horror about scavenging at abandoned moons to sell scrap to the Company.

Similarity 55%
Price 9.75€
Rating 9.6
Release 23 Oct 2023

Hospital 666

Hospital 666 is a 1-4 player horror escape game. Traverse through eerie hospital levels while observing the occurrence of anomalies and choosing the correct elevator. Some abnormal bosses will chase you to death, and you must find the right way to escape them.

Similarity 54%
Price 7.79€
Rating 7.0
Release 05 Mar 2024

Welcome to Kowloon

This is an indie horror from the first person, in which you find yourself in an area called Kowloon in search of cheap housing. The inhabitants of this place only at first glance seem to be ordinary people, but if we dig deeper, we will see their real faces.

Similarity 54%
Price 6.89€
Rating 7.9
Release 01 Aug 2023

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.

Similarity 54%
Price 5.69€
Rating 6.8
Release 27 Oct 2022

CASE: Online - Unofficial Fan Game

CASE: Online – An Unofficial Fan Game inspired by CASE 2: Animatronics Survival. Recapture the excitement of 2018’s multiplayer mode with up to 8 players, taking on roles as either animatronics or survivors!

Similarity 54%
Price Free to play
Rating 6.6
Release 09 Apr 2024

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 April 30th 2025.

1. Dead by Daylight

Similarity 56% 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 790,041 reviews of which 624,264 were positive and 165,777 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 28,299 peak concurrent players over the last day.
7.9
624,264
165,777

28,299
players

2. Phasmophobia

Similarity 90% 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 764,580 reviews of which 732,704 were positive and 31,876 were negative resulting in an impressive rating of 9.5 out of 10. While seeing 10,655 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
732,704
31,876

10,655
players

3. The Outlast Trials

Similarity 51% 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 65,567 reviews of which 61,275 were positive and 4,292 were negative resulting in an impressive rating of 9.2 out of 10. While seeing 4,004 players online at once in the last 24 hours, this game is currently ranked #3 among games like Project Unknown based on player count.
9.2
61,275
4,292

4,004
players

4. Lethal Company

Similarity 55% 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 485,075 reviews of which 471,550 were positive and 13,525 were negative resulting in an impressive rating of 9.6 out of 10. With 2,627 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Project Unknown.
9.6
471,550
13,525

2,627
players

5. SCP: Secret Laboratory

Similarity 58% 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 212,134 reviews of which 194,042 were positive and 18,092 were negative resulting in an impressive rating of 9.0 out of 10. With 2,310 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Project Unknown.
9.0
194,042
18,092

2,310
players

6. Killing Floor 2

Similarity 52% 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 126,532 reviews of which 111,048 were positive and 15,484 were negative resulting in a rating of 8.7 out of 10. With 908 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Project Unknown.
8.7
111,048
15,484

908
players

7. Escape the Backrooms

Similarity 66% 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. Escape the Backrooms is a horror, multiplayer and online co-op game developed and published by Fancy Games. Released on August 11th 2022 has received 100,691 reviews of which 91,674 were positive and 9,017 were negative resulting in a rating of 9.0 out of 10. With 621 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Project Unknown.
9.0
91,674
9,017

621
players

8. Liar's Bar

Similarity 57% Dive into this multiplayer online experience set in a sketchy bar where the games are as dangerous as the patrons. Join a table of 4 and test your skills in Liar's Dice and Liar's Deck, where lying and bluffing are key to victory. Ready for a night at Liar's Bar? Liar's Bar is a multiplayer, casual and pvp game developed and published by Curve Animation. Released on October 02nd 2024 has received 47,924 reviews of which 43,872 were positive and 4,052 were negative resulting in a rating of 9.0 out of 10. With 562 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Project Unknown.
9.0
43,872
4,052

562
players

9. Content Warning

Similarity 68% Film your friends doing scary things to become SpöökTube famous! (strongly advised to not go alone) Content Warning is a online co-op, horror and multiplayer game developed by Skog, Zorro, Wilnyl, Philip and thePetHen and published by landfall. Released on April 01st 2024 has received 143,027 reviews of which 135,655 were positive and 7,372 were negative resulting in an impressive rating of 9.4 out of 10. With 554 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Project Unknown.
9.4
135,655
7,372

554
players

10. Backrooms: Escape Together

Similarity 64% 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. Backrooms: Escape Together is a multiplayer, horror and psychological horror game developed and published by Triiodide Studios. Released on October 18th 2022 has received 20,869 reviews of which 18,193 were positive and 2,676 were negative resulting in a rating of 8.5 out of 10. With 508 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Project Unknown.
8.5
18,193
2,676

508
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 April 30th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Project Unknown.

1. Maid of Sker

Similarity 51% Maid of Sker is a first-person survival horror, set in a remote hotel with a gory and macabre history from Welsh folklore. Brave the nightmares of the Quiet Ones. Do not panic…don’t even breathe! Maid of Sker is a horror, adventure and action game developed and published by Wales Interactive. Released on July 28th 2020 has received 2,177 reviews of which 1,718 were positive and 459 were negative resulting in a rating of 7.6 out of 10. Featuring a massive 94% discount, this game currently holds the #1 spot in the best deals for games like Project Unknown.
7.6
1,718
459

-94% 23.67€ 1.42€

2. Killing Floor 2

Similarity 52% 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 126,532 reviews of which 111,048 were positive and 15,484 were negative resulting in a rating of 8.7 out of 10. Thanks to its incredible 92% discount, this game is now the #2 best deal in games like Project Unknown.
8.7
111,048
15,484

-92% 29.13€ 2.33€

3. The Blackout Club

Similarity 65% 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 2,830 reviews of which 2,203 were positive and 627 were negative resulting in a rating of 7.5 out of 10. Thanks to its incredible 92% discount, this game is now the #3 best deal in games like Project Unknown.
7.5
2,203
627

-92% 30.00€ 2.40€

4. Distrust: Polar Survival

Similarity 51% DISTRUST is an isometric survival adventure with procedural generation on an Arctic research station lost in the endless dark of a polar night. A story-rich fiction with multiple endings that suits both singleplayer fans and co-op enthusiasts. Distrust: Polar Survival is a survival, multiplayer and isometric game developed by Cheerdealers and published by Alawar. Released on August 23rd 2017 has received 2,409 reviews of which 1,733 were positive and 676 were negative resulting in a rating of 7.0 out of 10. Currently offered at a significant 90% discount, this title has earned the #4 position in the best deals for games like Project Unknown.
7.0
1,733
676

-90% 12.79€ 1.27€

5. FOREWARNED

Similarity 60% FOREWARNED is a 1-4 player co-op survival horror. Delve deep into ancient Egyptian ruins with your team of fellow archaeologists. Investigate phenomena, collect treasure, discover lore, survive danger, and banish the evil that lurks within. FOREWARNED is a horror, online co-op and survival horror game developed and published by Dreambyte Games. Released on April 25th 2024 has received 6,384 reviews of which 5,802 were positive and 582 were negative resulting in a rating of 8.8 out of 10. Currently offered at a significant 85% discount, this title has earned the #5 position in the best deals for games like Project Unknown.
8.8
5,802
582

-85% 10.67€ 1.60€

6. Blair Witch

Similarity 58% Inspired by the cinematic lore of Blair Witch, experience a new story-driven psychological horror game that studies your reactions to fear and stress. Blair Witch is a adventure, horror and psychological horror game developed by Bloober Team SA and published by Bloober Team NA. Released on August 30th 2019 has received 7,161 reviews of which 5,641 were positive and 1,520 were negative resulting in a rating of 7.7 out of 10. Currently offered at a significant 80% discount, this title has earned the #6 position in the best deals for games like Project Unknown.
7.7
5,641
1,520

-80% 29.99€ 5.99€

7. White Noise 2

Similarity 60% Enjoy a 4vs1 asymmetric horror experience like no other. Be a part of the investigator team, or take control of the creature and devour them! White Noise 2 is a horror, multiplayer and survival horror game developed and published by Milkstone Studios. Released on April 07th 2017 has received 2,861 reviews of which 2,277 were positive and 584 were negative resulting in a rating of 7.7 out of 10. Currently offered at a significant 75% discount, this title has earned the #7 position in the best deals for games like Project Unknown.
7.7
2,277
584

-75% 10.12€ 2.53€

8. Shadows Peak

Similarity 50% Shadows Peak is an atmospheric, open-world horror game focused on exploration that doesn't hold your hand. You play as a writer who has decided to visit a mysterious place called Shadows Peak to gather materials for a new book about legends. Shadows Peak is a mystery, horror and survival horror game developed and published by Gua. Released on March 13th 2017 has received 327 reviews of which 233 were positive and 94 were negative resulting in a rating of 6.8 out of 10. Currently offered at a significant 75% discount, this title has earned the #8 position in the best deals for games like Project Unknown.
6.8
233
94

-75% 9.75€ 2.43€

9. 灵魂筹码 Soul at Stake

Similarity 62% Soul at Stake is an oriental-themed 1v4 surviving horror game. There once was a luring urban myth saying that if one can win the game would gain countless money, and his/her destiny would instantly change to become the mightiest overnight. All the participants need only one stake——their souls. 灵魂筹码 Soul at Stake is a action, rpg and indie game developed and published by Chongming Studio. Released on June 25th 2018 has received 8,435 reviews of which 6,348 were positive and 2,087 were negative resulting in a rating of 7.4 out of 10. Currently offered at a significant 74% discount, this title has earned the #9 position in the best deals for games like Project Unknown.
7.4
6,348
2,087

-74% 15.12€ 3.93€

10. The Dark Pictures Anthology: Little Hope

Similarity 54% Trapped and isolated in the abandoned town of Little Hope, 4 college students and their teacher must escape the nightmarish apparitions that relentlessly pursue them through an impenetrable fog. The Dark Pictures Anthology: Little Hope is a horror, multiple endings and story rich game developed by Supermassive Games and published by BANDAI NAMCO Entertainment Europe. Released on October 29th 2020 has received 8,784 reviews of which 6,442 were positive and 2,342 were negative resulting in a rating of 7.2 out of 10. Currently offered at a significant 71% discount, this title has earned the #10 position in the best deals for games like Project Unknown.
7.2
6,442
2,342

-71% 20.14€ 5.84€

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 April 30th 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. SCP: Secret Laboratory

Similarity 58% 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 212,134 reviews of which 194,042 were positive and 18,092 were negative resulting in an impressive rating of 9.0 out of 10. With 2,310 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Project Unknown.
9.0
194,042
18,092

2,310
players

2. Cry of Fear

Similarity 55% 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 73,466 reviews of which 65,020 were positive and 8,446 were negative resulting in a rating of 8.7 out of 10. Thanks to its free to play tag and a daily player base of 275, this game has secured the #2 spot in the ranking of free games like Project Unknown.
8.7
65,020
8,446

275
players

3. Counter-Strike Nexon

Similarity 53% Counter-Strike Nexon is a Free to Play MMOFPS offering competitive PvP and PvE action including content from the original Counter-Strike and all new game modes, map creation function, weapons, and hordes of Zombies! Counter-Strike Nexon is a free to play, fps and zombies game developed by Valve and NEXON and published by NEXON. Released on October 07th 2014 has received 42,618 reviews of which 28,330 were positive and 14,288 were negative resulting in a rating of 6.6 out of 10. Thanks to its free to play tag and a daily player base of 219, this game has secured the #3 spot in the ranking of free games like Project Unknown.
6.6
28,330
14,288

219
players

4. PROJECT: PLAYTIME

Similarity 63% 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 49,775 reviews of which 39,087 were positive and 10,688 were negative resulting in a rating of 7.7 out of 10. Attracting a solid base of 178 players due to its free access, this strategy game has achieved the #4 position in the best free games like Project Unknown.
7.7
39,087
10,688

178
players

5. We Were Here

Similarity 64% 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 29,725 reviews of which 26,809 were positive and 2,916 were negative resulting in a rating of 8.8 out of 10. Attracting a solid base of 133 players due to its free access, this strategy game has achieved the #5 position in the best free games like Project Unknown.
8.8
26,809
2,916

133
players

6. Dodgy Deliveries

Similarity 60% Co-op "Horror" game about running a delivery service with your friends! B̵̨̦͓͖̹̪̥̮͛̀̏̈́̐̔̉Ę̴̤̦̤͓̰̤́͗̚ ̵̨̺͓̱̞͔͉͙̀̂͂͋͠͠Ç̸̫͈̋͋͆̋̾̑̕͜Ä̴̛̟͑͛͋͂̌̕͜͝R̵̛͎̮̜̒̽̈́͂̓̒͘Ę̸͉̙̎̀͐͆Ḟ̶̼͖̭͇̗U̸̡̫͇̤̭̪̦̣̔Ḷ̶̛͖̙͗̋̈̇̕ ̷̡̢͕̦̜͚̌̎̃̔Ā̷̧͇͎̳͔̩̜̤̗͊̋Ţ̸̭̩͚̮͖͇̹̬̾ ̷͍̞̰͈̻̣͚̂̾ͅN̵̛̤͒̏̒͝Ḯ̵̡̘͇̖̏͘Ģ̸̛͙̥̞̽̀͒͜H̶̲̜̺̐̄͋͊̍̈́͘͜T̴̯̲̳̪͚̜̼̈͠ Dodgy Deliveries is a online co-op, horror and co-op game developed by Tomas Gonzalez and German Rieck and published by Deliver Games. Released on January 31st 2025 has received 855 reviews of which 670 were positive and 185 were negative resulting in a rating of 7.5 out of 10. The game currently holds the #6 spot among the most played free games like Project Unknown.
7.5
670
185

53
players

7. Fear Surrounds

Similarity 53% Fear Surrounds is a horror-tinged take on the werewolf-style social subterfuge genre, where two evil spirits hide within a group of players and attempt to sabotage and murder them. Fear Surrounds is a multiplayer, horror and online co-op game developed by SaltyEgg Studio and published by Yooreka Studio. Released on October 19th 2021 has received 10,739 reviews of which 9,263 were positive and 1,476 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #7 spot among the most played free games like Project Unknown.
8.4
9,263
1,476

36
players

8. Zombie Panic! Source

Similarity 54% Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification. Zombie Panic! Source is a free to play, zombies and multiplayer game developed and published by Zombie Panic! Team. Released on October 03rd 2008 has received 7,717 reviews of which 6,533 were positive and 1,184 were negative resulting in a rating of 8.2 out of 10. The game currently holds the #8 spot among the most played free games like Project Unknown.
8.2
6,533
1,184

19
players

9. Unfortunate Spacemen

Similarity 53% An online multiplayer game about shapeshifting deception and betrayal! As a hapless, brave spaceman employed by The Company you'll work diligently to defend and be rescued from failing outposts, but not everyone around you is who they claim to be... Unfortunate Spacemen is a survival horror, investigation and co-op game developed by Geoff 'Zag' Keene and Deep Field Games and published by Deep Field Games and New Blood Interactive . Released on June 12th 2020 has received 7,482 reviews of which 6,457 were positive and 1,025 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #9 spot among the most played free games like Project Unknown.
8.4
6,457
1,025

11
players

10. Serena

Similarity 50% How long has it been? A man sits in a distant getaway cabin waiting for his wife Serena. Where is she? Things in the cabin evoke memories, and the husband comes to a disturbing realization... This short point-and-click adventure is the result of a massive collaborative effort between dozens of fans and designers of adventure games. Serena is a horror, free to play and indie game developed and published by Senscape. Released on January 30th 2014 has received 6,435 reviews of which 4,952 were positive and 1,483 were negative resulting in a rating of 7.5 out of 10. The game currently holds the #10 spot among the most played free games like Project Unknown.
7.5
4,952
1,483

8
players