AtlyssDedicatedServer

🖧 ATLYSS Dedicated Server Plugin

Originally made by FleeTime.

This BepInEx plugin adds headless dedicated server support to ATLYSS, enabling you to run the game in a terminal as a dedicated server — no graphics or UI needed.

⚠️ This is for hosting servers only. It will disable itself when the game is being launched normally.

✅ Mod Compatibility

• Fully compatible with other BepInEx mods that modify or enhance hosting behavior.

This includes:

• Chat formatting mods (e.g., colored messages)
• Uncapped party size or connection limit mods
• Custom stat or balance changes
• Lobby tweak plugins

As long as the mod loads under BepInEx and applies during host/server initialization, it will work seamlessly with this dedicated server plugin.

🔍 Known Issues

• Connecting to the dedicated server using the same Steam account is not possible.
• While you may be able to launch a new game instance in parallel with the dedicated server,

it is not possible to connect to it using the same account as the one hosting the dedicated server.

• As such, it's best to host the dedicated server using a separate Steam account with a copy of ATLYSS on it.

✅ Requirements

• BepInEx 5.x
• ATLYSS 112025.a4
• Must launch the game with the following arguments:

-batchmode -nographics -server

🛠️ Launch Syntax

ATLYSS.exe -batchmode -nographics -server [options...]

You must include at least-server before your own custom arguments for the mod to activate.

Specifying -batchmode -nographics is optional, but desirable to enable proper headless support.

The mod also generates start_dedicated_server.cmd on Windows and start_dedicated_server.sh on Linux that do it for you, however you might need to have the Steam client active for it to work correctly.

🔧 Available Arguments

| Argument | Config Setting | Description | Values | Default |

|-------------------------|---------------------------------------|-------------------------------------------------------------------|---------------------------------------------|-----------------------------|

| -server | | Enables dedicated server mode | | |

| -hostsave N | CharacterSlotToUse | Selects the save slot to use for the host character | int, min 0, max 104 | 0 |

| -name "MyServer" | | Sets the server name (max 20 characters) | string, max 20 | ATLYSS Server |

| -password "1234" | ServerPassword | Sets a join password | string | |

| -motd "Message" | ServerMOTD | Sets a Message of the Day | string | Welcome to ATLYSS Server! |

| -maxplayers N | ServerMaxPlayers | Max number of players | int, min 2, max 250 | 16 |

| -public | ServerType (PUBLIC) | Makes server public | | default type |

| -private | ServerType (PRIVATE) | Makes server private | | |

| -friends | ServerType (FRIENDS) | Makes server visible only to Steam friends | | |

| -pve | ServerTag (GAIA) | Lobby focus: PvE | | default tag |

| -pvp | ServerTag (DUALOS) | Lobby focus: PvP | | |

| -social | ServerTag (NOTH) | Lobby focus: Social | | |

| -rp | ServerTag (LOODIA) | Lobby focus: RP | | |

| -autorestart | PeriodicRestartEnabled | Enables automatic restarts | true/false | false |

| -autorestartin | PeriodicRestartInterval | Specifies time between restarts (like 1d or 6h) | string, format like 1d12h30m, min 30m | 6h (6 hours) |

| -autorestartthreshold | PeriodicRestartPlayerThresholdPercent | Specifies player count % below which the server will auto restart | int, min 0, max 100 (= % of max players) | 100 (percent) |

⚠️ The priority of server type argument is -public, -private, then -friends in that order.

⚠️ The priority of server tag argument is -pve, -pvp, -social, then -rp in that order.

⚠️ If -hostsave is not specified, the server will default to using save slot 0.

⚠️ If there is no valid character in the given slot, a new random one will be created in it.

📦 Example Usages

Start a public PvE server with 16 players:

ATLYSS.exe -batchmode -nographics -server -name "MyServer" -motd "Welcome!" -maxplayers 16 -public -pve

Start a private PvP server wi