Games like Cepheus Protocol on Steam
For those who prefer not to search, lists of the most played, top deals and best free games like Cepheus Protocol are available at the bottom of the page.
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Scrapnaut
Scrapnaut is a co-op & singleplayer top-down, base building survival game with steampunk elements. Explore an open world with different biomes, take care of oxygen, manage your farms, generate electricity, build your home and much more!
Songs of Syx
Songs of Syx is a fantasy city-builder where you start off as an insignificant colony and build, scheme, and fight your way towards a metropolis and empire. The mechanics are complex and true to life, where small events can spiral into the collapse of kingdoms. Try the unlimited demo first!
Grim Nights
Your village must survive for 13 days! Gather resources, expand, explore the underground for riches, and train soldiers to defend against hordes of the undead.
Next Day: Survival
Next Day is a multi-player SURVIVAL game with elements of RPG, in an imaginary country in Eastern Europe. Carry out an array of tasks, learn skills, and develop your character. Have shootouts with opponents and earn a reputation.
S.T.A.L.K.E.R.: Call of Pripyat
S.T.A.L.K.E.R.: Call of Pripyat is the direct sequel of the S.T.A.L.K.E.R.: Shadow of Chernobyl. As a Major Alexander Degtyarev you should investigate the crash of the governmental helicopters around the Zone and find out, what happened there.
S.T.A.L.K.E.R.: Clear Sky
S.T.A.L.K.E.R.: Clear Sky – standalone prequel for the acclaimed S.T.A.L.K.E.R.: Shadow of Chernobyl, which tells you story about the Clear Sky group, that want to research the Zone and understand it better.Most played games like Cepheus Protocol on Steam
Take a look at the top games like Cepheus Protocol that are currently attracting the largest player bases on the Steam platform, as of April 17th 2025.
1. Rust
Similarity 52% The only aim in Rust is to survive. Everything wants you to die - the island’s wildlife, other inhabitants, the environment, and other survivors. Do whatever it takes to last another night. Rust is a survival, crafting and multiplayer game developed and published by Facepunch Studios. Released on February 08th 2018 has received 1,210,131 reviews of which 1,055,970 were positive and 154,161 were negative resulting in a rating of 8.7 out of 10. The game has hit the top spot as the #1 most played game like Cepheus Protocol, thanks to its 79,778 peak concurrent players over the last day.
8.7
1,055,970
154,161
79,778
players
2. Hearts of Iron IV
Similarity 51% Victory is at your fingertips! Your ability to lead your nation is your supreme weapon, the strategy game Hearts of Iron IV lets you take command of any nation in World War II; the most engaging conflict in world history. Hearts of Iron IV is a strategy, world war ii and grand strategy game developed by Paradox Development Studio and published by Paradox Interactive. Released on June 06th 2016 has received 337,250 reviews of which 300,980 were positive and 36,270 were negative resulting in a rating of 8.8 out of 10. While seeing 27,165 players online at once in the last 24 hours, this game is currently ranked #2 among games like Cepheus Protocol based on player count.
8.8
300,980
36,270
27,165
players
3. RimWorld
Similarity 51% A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more. RimWorld is a colony sim, base-building and survival game developed and published by Ludeon Studios. Released on October 17th 2018 has received 207,285 reviews of which 203,071 were positive and 4,214 were negative resulting in an impressive rating of 9.7 out of 10. While seeing 19,632 players online at once in the last 24 hours, this game is currently ranked #3 among games like Cepheus Protocol based on player count.
9.7
203,071
4,214
19,632
players
4. 7 Days to Die
Similarity 62% 7 Days to Die is an open-world game that is a unique combination of first-person shooter, survival horror, tower defense, and role-playing games. Play the definitive zombie survival sandbox RPG that came first. Navezgane awaits! 7 Days to Die is a survival, zombies and multiplayer game developed by The Fun Pimps and published by The Fun Pimps Entertainment LLC. Released on July 25th 2024 has received 366,213 reviews of which 324,486 were positive and 41,727 were negative resulting in a rating of 8.8 out of 10. With 18,474 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Cepheus Protocol.
8.8
324,486
41,727
18,474
players
5. Project Zomboid
Similarity 63% Project Zomboid is the ultimate in zombie survival. Alone or in MP: you loot, build, craft, fight, farm and fish in a struggle to survive. A hardcore RPG skillset, a vast map, massively customisable sandbox and a cute tutorial raccoon await the unwary. So how will you die? All it takes is a bite.. Project Zomboid is a survival, zombies and open world game developed and published by The Indie Stone. Released on November 08th 2013 has received 367,520 reviews of which 346,127 were positive and 21,393 were negative resulting in an impressive rating of 9.3 out of 10. With 18,167 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Cepheus Protocol.
9.3
346,127
21,393
18,167
players
6. Satisfactory
Similarity 54% Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven! Satisfactory is a base-building, automation and open world game developed by Coffee Stain Studios and published by Coffee Stain Publishing. Released on September 10th 2024 has received 228,332 reviews of which 221,780 were positive and 6,552 were negative resulting in an impressive rating of 9.6 out of 10. With 15,418 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Cepheus Protocol.
9.6
221,780
6,552
15,418
players
7. Factorio
Similarity 51% Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you. Factorio is a automation, base-building and resource management game developed and published by Wube Software LTD.. Released on August 14th 2020 has received 212,622 reviews of which 206,226 were positive and 6,396 were negative resulting in an impressive rating of 9.6 out of 10. With 14,702 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Cepheus Protocol.
9.6
206,226
6,396
14,702
players
8. Unturned
Similarity 54% You're a survivor in the zombie infested ruins of society, and must work with your friends and forge alliances to remain among the living. Unturned is a free to play, survival and zombies game developed and published by Smartly Dressed Games. Released on July 07th 2017 has received 553,929 reviews of which 505,358 were positive and 48,571 were negative resulting in an impressive rating of 9.1 out of 10. With 10,836 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Cepheus Protocol.
9.1
505,358
48,571
10,836
players
9. Oxygen Not Included
Similarity 51% Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive. Oxygen Not Included is a colony sim, base-building and survival game developed and published by Klei Entertainment. Released on July 30th 2019 has received 127,145 reviews of which 123,019 were positive and 4,126 were negative resulting in an impressive rating of 9.5 out of 10. With 4,669 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Cepheus Protocol.
9.5
123,019
4,126
4,669
players
10. Raft
Similarity 58% Raft™ throws you and your friends into an epic oceanic adventure! Alone or together, players battle to survive a perilous voyage across a vast sea! Gather debris, scavenge reefs and build your own floating home, but be wary of the man-eating sharks! Raft is a survival, multiplayer and open world survival craft game developed by Redbeet Interactive and published by Axolot Games. Released on June 20th 2022 has received 342,483 reviews of which 319,669 were positive and 22,814 were negative resulting in an impressive rating of 9.2 out of 10. With 4,520 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Cepheus Protocol.
9.2
319,669
22,814
4,520
players
Best deals on games like Cepheus Protocol on Steam
Discover fantastic savings with the best discounts on a variety of games like Cepheus Protocol available on Steam right now, updated on April 17th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Cepheus Protocol.
1. Stronghold Crusader 2
Similarity 62% Stronghold Crusader 2 is the long awaited sequel to the original castle sim. After 12 years Stronghold returns to the desert with a new 3D engine and powerful Havok Physics. Crusader 2 recaptures the original game’s addictive, fast-paced gameplay and authentic castle simulation. Stronghold Crusader 2 is a strategy, medieval and city builder game developed and published by FireFly Studios. Released on September 22nd 2014 has received 16,919 reviews of which 12,202 were positive and 4,717 were negative resulting in a rating of 7.1 out of 10. Featuring a massive 95% discount, this game currently holds the #1 spot in the best deals for games like Cepheus Protocol.
7.1
12,202
4,717
-95%
34.80€
1.74€
2. Life is Feudal: Forest Village
Similarity 54% LiF:Forest Village is a city builder with survival aspects in a realistic harsh medieval world. Shape, build and expand your settlement, grow various food to prevent your villagers from avitaminosis and starvation. Possess them for additional micromanagement or simply to wander around. Life is Feudal: Forest Village is a city builder, colony sim and strategy game developed by Mindillusion and published by Bitbox Ltd.. Released on May 26th 2017 has received 5,873 reviews of which 3,892 were positive and 1,981 were negative resulting in a rating of 6.5 out of 10. Thanks to its incredible 93% discount, this game is now the #2 best deal in games like Cepheus Protocol.
6.5
3,892
1,981
-93%
24.57€
1.72€
3. Cartel Tycoon
Similarity 53% Cartel Tycoon is a survival business sim inspired by the ‘80s and '90s narco trade. Expand and conquer, fight off rival thugs and evade the authorities. Earn people's loyalty and strive to overcome the doomed fate of a power-hungry drug lord. Cartel Tycoon is a top-down, rts and resource management game developed by Moon Moose and published by tinyBuild. Released on July 26th 2022 has received 3,507 reviews of which 2,680 were positive and 827 were negative resulting in a rating of 7.4 out of 10. Thanks to its incredible 91% discount, this game is now the #3 best deal in games like Cepheus Protocol.
7.4
2,680
827
-91%
27.78€
2.50€
4. TerraTech
Similarity 54% TerraTech is an open-world, sandbox adventure game, where you design and build your own creations through a mix of crafting, combat and discovery. Design vehicles from a huge library of blocks. Scavenge, craft and buy new parts to survive and become the ultimate planetary prospector. TerraTech is a building, sandbox and open world game developed and published by Payload Studios. Released on August 10th 2018 has received 23,221 reviews of which 21,196 were positive and 2,025 were negative resulting in a rating of 8.9 out of 10. Currently offered at a significant 90% discount, this title has earned the #4 position in the best deals for games like Cepheus Protocol.
8.9
21,196
2,025
-90%
24.20€
2.42€
5. Endzone - A World Apart
Similarity 56% Endzone is a post-apocalyptic survival city builder, where you start a new civilization with a group of people after an ecological disaster. Build them a new home and ensure their survival in a shattered world, threatened by constant radiation, toxic rain, sandstorms and droughts. Endzone - A World Apart is a city builder, survival and strategy game developed by Gentlymad Studios and published by Assemble Entertainment and WhisperGames. Released on March 18th 2021 has received 9,366 reviews of which 7,216 were positive and 2,150 were negative resulting in a rating of 7.5 out of 10. Currently offered at a significant 90% discount, this title has earned the #5 position in the best deals for games like Cepheus Protocol.
7.5
7,216
2,150
-90%
29.99€
2.99€
6. DESOLATE
Similarity 58% DESOLATE is a first person horror survival experience. Form a research team with up to 4 players and explore an open world filled with mysteries and unsolved questions, or do it all on your own. DESOLATE is a survival, open world and horror game developed by Nearga and published by HypeTrain Digital. Released on January 17th 2019 has received 7,859 reviews of which 5,248 were positive and 2,611 were negative resulting in a rating of 6.6 out of 10. Currently offered at a significant 90% discount, this title has earned the #6 position in the best deals for games like Cepheus Protocol.
6.6
5,248
2,611
-90%
15.10€
1.51€
7. Andarilho
Similarity 63% You are a guy with a backpack, just try to stay alive! Andarilho is a survival, crafting and open world game developed and published by SC Jogos. Released on November 12th 2020 has received 1,229 reviews of which 817 were positive and 412 were negative resulting in a rating of 6.5 out of 10. Currently offered at a significant 90% discount, this title has earned the #7 position in the best deals for games like Cepheus Protocol.
6.5
817
412
-90%
4.90€
0.49€
8. Endzone - A World Apart
Similarity 56% Endzone is a post-apocalyptic survival city builder, where you start a new civilization with a group of people after an ecological disaster. Build them a new home and ensure their survival in a shattered world, threatened by constant radiation, toxic rain, sandstorms and droughts. Endzone - A World Apart is a game developed and published by . Released on March 18th 2021 has received 9,366 reviews of which 7,216 were positive and 2,150 were negative resulting in a rating of 7.5 out of 10. Currently offered at a significant 90% discount, this title has earned the #8 position in the best deals for games like Cepheus Protocol.
7.5
7,216
2,150
-90%
29.99€
2.99€
9. Sheltered
Similarity 59% Sheltered is a deep and emotional survival management game. You take on the role of protecting four family members who, after a global apocalypse, have found their way to a deserted shelter. Sheltered is a survival, base-building and post-apocalyptic game developed by Unicube and Team 17 Digital Ltd and published by Team17 Digital Ltd. Released on March 15th 2016 has received 6,078 reviews of which 4,959 were positive and 1,119 were negative resulting in a rating of 7.9 out of 10. Currently offered at a significant 88% discount, this title has earned the #9 position in the best deals for games like Cepheus Protocol.
7.9
4,959
1,119
-88%
12.75€
1.53€
10. Against the Storm
Similarity 55% A dark fantasy city builder where you must rebuild civilization in the face of apocalyptic rains. As the Queen’s Viceroy, lead humans, beavers, lizards, foxes, and harpies to reclaim the wilderness and secure a future for civilization's last survivors. Against the Storm is a strategy, simulation and city builder game developed by Eremite Games and published by Hooded Horse. Released on December 08th 2023 has received 30,816 reviews of which 29,274 were positive and 1,542 were negative resulting in an impressive rating of 9.3 out of 10. Currently offered at a significant 87% discount, this title has earned the #10 position in the best deals for games like Cepheus Protocol.
9.3
29,274
1,542
-87%
30.77€
4.00€
Free games like Cepheus Protocol on Steam
Check out this fantastic list of free-to-play games like Cepheus Protocol you can enjoy on Steam right now, updated on April 17th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like Cepheus Protocol.
1. Unturned
Similarity 54% You're a survivor in the zombie infested ruins of society, and must work with your friends and forge alliances to remain among the living. Unturned is a free to play, survival and zombies game developed and published by Smartly Dressed Games. Released on July 07th 2017 has received 553,929 reviews of which 505,358 were positive and 48,571 were negative resulting in an impressive rating of 9.1 out of 10. With 10,836 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Cepheus Protocol.
9.1
505,358
48,571
10,836
players
2. Fallout Shelter
Similarity 53% Fallout Shelter puts you in control of a state-of-the-art underground Vault from Vault-Tec. Build the perfect Vault, keep your Dwellers happy, and protect them from the dangers of the Wasteland. Fallout Shelter is a free to play, base-building and survival game developed by Bethesda Game Studios and published by Bethesda Softworks. Released on March 29th 2017 has received 73,710 reviews of which 65,209 were positive and 8,501 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 956, this game has secured the #2 spot in the ranking of free games like Cepheus Protocol.
8.7
65,209
8,501
956
players
3. Midas Gold Plus
Similarity 53% Discover Midas Gold Plus, an engaging idle clicker set in a mythical world! Harness King Midas' golden touch, build a legendary city, and unlock powerful champions. Master unique gameplay styles, explore pet battles, and conquer rival cities. Delve into this ancient tycoon adventure today! Midas Gold Plus is a free to play, clicker and indie game developed and published by Holyday Studios. Released on February 01st 2017 has received 1,752 reviews of which 1,503 were positive and 249 were negative resulting in a rating of 8.2 out of 10. The game currently holds the #3 spot among the most played free games like Cepheus Protocol.
8.2
1,503
249
30
players
4. Outpost
Similarity 53% Outpost brings the perfect mix between survival and roguelite gameplay. Start the game in a randomly generated environment and try to adapt, and make it through as many nights as possible. How long can you survive? Outpost is a free to play, indie and strategy game developed and published by Open Mid Interactive. Released on May 01st 2020 has received 756 reviews of which 663 were positive and 93 were negative resulting in a rating of 8.3 out of 10. The game currently holds the #4 spot among the most played free games like Cepheus Protocol.
8.3
663
93
4
players
5. Oxygen: First Breath
Similarity 51% This is a free version of Oxygen, featuring the first 50 game-days. Build your city around the Oxygen Center and ensure your people's survival in a post-apocalyptic future, threatened by crack explosions, deadly winds, droughts and frosts. Lead your people and keep the Oxygen Center running! Oxygen: First Breath is a strategy, base building and simulation game developed by Turquoise Revival Games and published by GrabTheGames and UpgradePoint. Released on October 07th 2022 has received 1,584 reviews of which 1,423 were positive and 161 were negative resulting in a rating of 8.6 out of 10. The game currently holds the #5 spot among the most played free games like Cepheus Protocol.
8.6
1,423
161
1
players
6. Kingdom Wars
Similarity 53% Kingdom Wars is a free to play 3D MMORTS with real-time siege combat, without the pay to win element so common in the genre. Kingdom Wars offers beautiful 3D online world, where players construct strongholds, direct citizens, complete quests and eventually manage a global empire. Kingdom Wars is a strategy, free to play and rts game developed by Reverie World Studios and published by . Released on April 01st 2013 has received 2,779 reviews of which 1,871 were positive and 908 were negative resulting in a rating of 6.6 out of 10. The game currently holds the #6 spot among the most played free games like Cepheus Protocol.
6.6
1,871
908
1
players
7. Guns and Robots
Similarity 51% Guns and Robots is free to play online third person shooter. The game brings robot action with massive customization. Players get cartoony bright 3D graphics in attractive environments and challenge each other in open arenas. Guns and Robots is a free to play, action and robots game developed by Masthead Studios Ltd and published by Masthead Studios Ltd, Thegamewallstudios and gamigo AG. Released on August 04th 2014 has received 1,691 reviews of which 1,113 were positive and 578 were negative resulting in a rating of 6.4 out of 10. The game currently holds the #7 spot among the most played free games like Cepheus Protocol.
6.4
1,113
578
1
players
8. The Wall
Similarity 53% [Servers Temporarily Shut Down!] Build. Gather. Breach. The Wall is a never-before seen mix of genres, where dynamic maps, slick combat, base building, and economy management all come together. The Wall is a early access, fps and wargame game developed and published by Aero Games. Released on November 02nd 2018 has received 384 reviews of which 275 were positive and 109 were negative resulting in a rating of 6.8 out of 10. The game currently holds the #8 spot among the most played free games like Cepheus Protocol.
6.8
275
109
9. Zombie Builder Defense
Similarity 53% Top down, action packed, multiplayer, zombie shooter. Build your base with friends and see how long you can survive the endless horde of zombies. Level up with friends, or alone, how you die is up to you. Zombie Builder Defense is a action, zombies and online co-op game developed and published by Noham Games. Released on November 02nd 2018 has received 493 reviews of which 333 were positive and 160 were negative resulting in a rating of 6.5 out of 10. The game currently holds the #9 spot among the most played free games like Cepheus Protocol.
6.5
333
160