Setup Headless Server

Headless Server

Since Nebula 0.8.7, Nebula can be ran in headless mode (#62, #553)
The following are the steps to run it.

Preparation

Steam

If you purchased the game on Steam, you're required to be logged into Steam in order to run the game on your server.
If you only have one Steam account, you can setup Steam Offline Mode.

Create a steam_appid.txt file in the root of the game directory (next to DSPGame.exe) with the text 1366540. Now you can run the game from the exe.

Mod Manager

If you're using the mod manager, you can go to Settings -> Debugging -> Set launch parameters to set the following command line.
For example, -batchmode -nographics -server -load save1
The config file can be found in Config editor -> find BepInEx\config\nebula.cfg

Command Line

The dedicated server can be started from the command line with:
./DSPGAME.exe -batchmode -nographics -server -load save1
Where save1 is the name of the savefile.

Unity CLI arguments

Command	Details
-batchmode	Run the application in “headless” mode. In this mode, the application doesn’t display anything or accept user input.
-nographics	When you use this argument in batch mode, Unity doesn’t initialize a graphics device.
-logFile <pathname>	Specify where Unity writes the Editor or Windows/Linux/OSX standalone log file.

Nebula CLI arguments

Command	Details
-server	Start DSP in dedicated headless server mode.
-load <savename>	Specify the save to load. App quits when the save doesn't exist.
-ups <integer value>	Set UPS to value using FPSController.SetFixUPS(value). Range: 5-240.

Config Options

The config file is BepInEx\config\nebula.cfg

Config Options	Default	Details
AutoPauseEnabled	true	Auto pause the game when there are no connected players.
RemoteAccessEnabled	false	Let authenticated clients access remote server commands
RemoteAccessPassword		If provided, this will set a password used for clients to authenticate for access to remote server commands
ServerPassword		If provided, this will set a password for the hosted server.

Chat commands

When the server has EnableRemoteSaveAccess enabled, clients can use following commands:

Command	Example	Details
/server list [saveNum]	/server list 5	Show the recent [saveNum] savefiles by time and savename on the server.
/server save [saveName]	/server save save1	Save current game as [saveName]. If saveName is not specified, it will save to _lastexit_.
/server load <saveName>	/server load save1	Load game from saveName. Current game will be saved to _lastexit_ before restart.

Demo

Headless server and a client, test chat commands
Check How to run 2 game instances on the same computer to run multiple instances of DSP.