The Riftbreaker co-op server hosting
Build your base on Galatea 37 with friends on a server that does not depend on the host’s PC. EXOR’s free dedicated server runs the co-op campaign, Open Campaign or Survival, with your own difficulty and password.
- Official dedicated server from EXOR Studios
- Co-op for up to 4 players
- Open Campaign, Story and Survival modes
- Password, RCON and pause when empty
- Playersserver_max_players_count can go higher, but EXOR warns that each extra player hurts performance.
- Up to 4 (officially supported)
- ServerIt installs with an anonymous SteamCMD login and does not need a copy of the game.
- Free Steam tool, about 600 MB
- Modes
- Open Campaign · Story · Survival
- Config
- config.cfg
- Joining
- Server browser over Steam networking
- Version
- Must match the game version
Modes
- Open Campaign
- Story
- Survival
- RCON
- Pause when empty
Game facts from EXOR Studios’ dedicated server announcements and setup guide on Steam, checked in October 2026.
- DDoS protection
- 20 game server locations
The Riftbreaker plans are being prepared
Tell us your group size and the mode you play, and our team will reply with the options. Or open a ticket and we will let you know when the plans are online.
How big should a Riftbreaker server be?
The server renders nothing, so EXOR points to CPU and RAM. Large bases and big waves of creatures are what raise the load.
Find your size
| Feature |
Duo
2 players
|
Recommended Full team
Up to 4 players
|
Late game
4 players with large bases
|
|---|---|---|---|
| Memory (RAM)Working memory for the world, the players and every mod. Leave headroom: memory use grows as players explore. | 4 GB | 6 GB | 8 GB |
| CPU coresThe server simulates every building, turret and creature; fast cores keep waves smooth. | 2 | 3–4 | 4 |
| Disk spaceThe server is about 600 MB; the rest is room for saves, backups and updates. | 5 GB | 5 GB | 10 GB |
| Typical use | Two friends on a campaign | A full team in Open Campaign or Survival | Long sessions with sprawling bases |
-
Duo
2 players
- Memory (RAM)Working memory for the world, the players and every mod. Leave headroom: memory use grows as players explore.
- 4 GB
- CPU coresThe server simulates every building, turret and creature; fast cores keep waves smooth.
- 2
- Disk spaceThe server is about 600 MB; the rest is room for saves, backups and updates.
- 5 GB
- Typical use
- Two friends on a campaign
-
Recommended
Full team
Up to 4 players
- Memory (RAM)Working memory for the world, the players and every mod. Leave headroom: memory use grows as players explore.
- 6 GB
- CPU coresThe server simulates every building, turret and creature; fast cores keep waves smooth.
- 3–4
- Disk spaceThe server is about 600 MB; the rest is room for saves, backups and updates.
- 5 GB
- Typical use
- A full team in Open Campaign or Survival
-
Late game
4 players with large bases
- Memory (RAM)Working memory for the world, the players and every mod. Leave headroom: memory use grows as players explore.
- 8 GB
- CPU coresThe server simulates every building, turret and creature; fast cores keep waves smooth.
- 4
- Disk spaceThe server is about 600 MB; the rest is room for saves, backups and updates.
- 10 GB
- Typical use
- Long sessions with sprawling bases
EXOR publishes no hardware figures and notes that server hardware decides performance; these starting points follow common practice for a 4-player base-building game.
Modes, settings and remote control
The whole server is set up in one config.cfg file next to DedicatedServer.exe.
Three modes
Open Campaign, the co-op Story campaign or Survival, each with its own difficulty from easy to brutal.
Name and password
Set server_name and server_password, and choose with server_broadcast_enabled whether the server shows in the browser.
Pause when empty
server_pause_game_when_empty stops progress while nobody is online, so your base is safe overnight.
RCON
Set server_rcon_password; players who enter it in the console can send commands to the server.
Load a save
Continue an existing game with mission_save. EXOR recommends backing up save files before you switch.
Set up your Riftbreaker server
Four steps from the config file to your first rift jump together.
-
Choose a mode
Open Campaign, Story or Survival, and the difficulty that suits your team.
-
Pick a location
Choose the one closest to your team from our 20 game server locations.
-
Edit config.cfg
Keep app_mode set to server, then set the campaign, mission, difficulty, name, password and RCON password.
-
Join from the browser
Players on the same game version find the server in the in-game server browser and enter the password.
Other game servers you might like
Satisfactory
Co-op factories with Steam and Epic crossplay and your own saves.
Foundry
A voxel factory that stays online, with Workshop mods.
Astroneer
Eight explorers instead of four, on a save that stays online.
Factorio
Headless Factorio 2.0 and Space Age with mods and RCON.
Core Keeper
An underground world for up to 8 players, from every PC store.
Frequently asked questions
Does The Riftbreaker have a dedicated server?
Yes. EXOR Studios released a free dedicated server in December 2025, after online co-op arrived with update 2.0 in August 2025. It installs from Steam’s Tools or with an anonymous SteamCMD login and does not need a copy of the game.
How many players can join?
Four players are officially supported. server_max_players_count accepts more, but EXOR warns that every player above four significantly hurts performance.
Which modes can the server run?
Open Campaign, the co-op Story campaign and Survival. Each has its own difficulty levels, from easy to brutal. Open Campaign, added in March 2026, skips the story and lets you start in any base-game biome.
How do I configure the server?
Edit config.cfg next to DedicatedServer.exe and start the server with cli=1 config=config.cfg. app_mode must stay set to server; campaign, mission and difficulty pick the game, and the server_ settings set the name, password, player limit and more.
Can I continue our existing game?
Yes. Point mission_save at the save you want to load. Back up your save files first, as EXOR recommends.
Does the game keep running when everyone leaves?
Only if you want it to. server_pause_game_when_empty pauses progress while no one is connected.
Why can my friends not join after a game update?
The server and the game must run the same version, and the server is updated separately from the game. Update it after every patch; the build number is shown at the bottom of the game’s menus.
How do I use RCON?
Set server_rcon_password in config.cfg. A player enters the same password in the game console and then sends commands as rcon followed by the command.
Does the Riftbreaker server run on Linux?
EXOR builds and tests the server for Windows. It says the server will likely run under Linux but has not tested it, so Windows is the supported choice.
Ready to break the rift together?
Tell us your group size and mode, and we will help you pick the right Riftbreaker server.