You will never get tired of building a settlement and defending yourself from waves of zombies. You will find similar gameplay in a selection of games similar to They are Billions from me.
12 Games Like They are Billions For PC (Steam, EGS, GOG)
12. Frostpunk (series)
similar games to Frostpunk- Buy: Steam
- Buy: Epic Games Store
- Similarity: 10 %
- Year of release: 2018 - 2024
- Game play time: 9 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
Develop, expand, and advance your city in a society survival game set 30 years after an apocalyptic blizzard ravaged Earth. In Frostpunk 2, you face not only the perils of never-ending winter, but also the powerful factions that watch your every step inside the Council Hall.

11. Dream Engines: Nomad Cities
- Buy: Steam
- Similarity: 50 %
- Year of release: 2024
- Game play time: 30 hours
- Genre: Survival
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
A survival city-building game with flying cities. Build, automate, and defend a flying city that travels between procedurally generated maps to survive in a wacky, nightmare-infested, post-apocalyptic world full of strange science and dreams.

10. Infection Free Zone
- Buy: Steam
- Similarity: 60 %
- Year of release: 2024
- Game play time: 15 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
Choose any real region from the world. Choose your base of operations, then rebuild and readapt the buildings around you to create a self-sustaining settlement. Take charge of a group of survivors from your city. And when the night falls - Defend the zone from the infected!

9. Project Zomboid
similar games to Project Zomboid- Buy: Steam
- Similarity: 60 %
- Year of release: 2024
- Game play time: 100 hours
- Genre: Survival
- Singleplayer: yes
- Coop: yes
- Multiplayer: yes
- Trailer: Youtube
- Reviews: Metacritic
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..

8. Conan Unconquered
- Buy: Steam
- Metascore: 62
- Similarity: 70 %
- Year of release: 2019
- Game play time: 20 hours
- Genre: Strategy
- Singleplayer: no
- Coop: yes
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
From the Command & Conquer veterans at Petroglyph comes the first ever survival RTS set in the savage world of Conan the Barbarian. Play solo or team up in multiplayer in Conan Unconquered’s action-packed co-op Mode where you build a shared stronghold and fend off the hordes together.

7. Diplomacy is Not an Option
- Buy: Steam
- Buy: GOG.com
- Metascore: 81
- Similarity: 70 %
- Year of release: 2024
- Game play time: 25 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
Diplomacy is Not an Option is a strategy game set in a medieval fantasy world. Build your town and defenses, raise huge armies and fight against massive hordes of enemies. How long can you survive?

6. From Glory To Goo
- Buy: Steam
- Similarity: 70 %
- Year of release: 2025
- Game play time: 20 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
From Glory To Goo is a Sci-Fi survival RTS set on an alien world. Serve as humanity's bulwark by establishing a colony and supporting your colonists still in orbit. But beware, for The Goo, a relentless and shape-shifting force approaches from all sides, even above and below.

5. Thronefall
- Buy: Steam
- Metascore: 92
- Similarity: 70 %
- Year of release: 2024
- Game play time: 12 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
A minimalist game about building and defending your little kingdom.

4. Age of Darkness: Final Stand
- Buy: Steam
- Metascore: 74
- Similarity: 80 %
- Year of release: 2025
- Game play time: 30 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: yes
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
Age of Darkness: Final Stand is a dark fantasy survival RTS where you must illuminate, build and defend humanity’s last bastion against hordes of Nightmares. Set in the remnants of a kingdom consumed by a deadly fog, you decide. Will you hide in the light? Or take back your world.

3. IDUN
- Buy: Steam
- Metascore: 73
- Similarity: 80 %
- Year of release: 2025
- Game play time: 25 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
A defense RTS where you can move turrets at will. Extract resources, upgrade technology, and defend against enemy swarms in a gripping space campaign. Hold the line, set up your turrets, and brace for screen-filling hordes!

2. The Last Spell
- Buy: Steam
- Metascore: 82
- Similarity: 80 %
- Year of release: 2023
- Game play time: 30 hours
- Genre: Roguelike
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
Defend the last bastion of humanity with your squad of heroes! Exterminate fiendish monsters with magic and brute force by night and re-build your battered city defenses by day in this tactical RPG with rogue-lite mechanics.

1. The Riftbreaker
- Buy: Steam
- Buy: Epic Games Store
- Buy: GOG.com
- Metascore: 83
- Similarity: 80 %
- Year of release: 2021
- Game play time: 20 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
- Review: IGN
The Riftbreaker™ is a base-building, survival game with Action-RPG elements. You are an elite scientist/commando inside an advanced Mecha-Suit capable of dimensional rift travel. Hack & slash countless enemies. Build up your base, collect samples and research new inventions to survive.

2 Games Like They are Billions On PlayStation 5
2. Frostpunk (series)
similar games to Frostpunk- Buy: Playstation Store
- Similarity: 10 %
- Year of release: 2018 - 2024
- Game play time: 9 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
Develop, expand, and advance your city in a society survival game set 30 years after an apocalyptic blizzard ravaged Earth. In Frostpunk 2, you face not only the perils of never-ending winter, but also the powerful factions that watch your every step inside the Council Hall.

1. The Riftbreaker
- Buy: Playstation Store
- Metascore: 83
- Similarity: 80 %
- Year of release: 2021
- Game play time: 20 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
- Review: IGN
The Riftbreaker™ is a base-building, survival game with Action-RPG elements. You are an elite scientist/commando inside an advanced Mecha-Suit capable of dimensional rift travel. Hack & slash countless enemies. Build up your base, collect samples and research new inventions to survive.

2 Games Like They are Billions On Xbox Series X|S
2. Frostpunk (series)
similar games to Frostpunk- Buy: Xbox Store
- Similarity: 10 %
- Year of release: 2018 - 2024
- Game play time: 9 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
Develop, expand, and advance your city in a society survival game set 30 years after an apocalyptic blizzard ravaged Earth. In Frostpunk 2, you face not only the perils of never-ending winter, but also the powerful factions that watch your every step inside the Council Hall.

1. The Riftbreaker
- Buy: Xbox Store
- Metascore: 83
- Similarity: 80 %
- Year of release: 2021
- Game play time: 20 hours
- Genre: Strategy
- Singleplayer: yes
- Coop: no
- Multiplayer: no
- Trailer: Youtube
- Reviews: Metacritic
- Review: IGN
The Riftbreaker™ is a base-building, survival game with Action-RPG elements. You are an elite scientist/commando inside an advanced Mecha-Suit capable of dimensional rift travel. Hack & slash countless enemies. Build up your base, collect samples and research new inventions to survive.

