A Risk of Rain 2 mod that broadcasts your run data over WebSocket, enabling stream overlays and companion apps to display your game state in real time.
The mod runs a WebSocket server on port 11420. Any client on the local network can connect to receive JSON updates roughly once per second. The mod also broadcasts a UDP discovery beacon on port 11421 so companion apps can find the server automatically.
Connect to ws://<host-ip>:11420/ to receive messages:
inventory_updateSent every second while a run is active. Contains the full game state snapshot.
run_endedSent when the run ends (death, victory, or quit).
request_challenges (client → server)Sent by a client to request the current challenge/achievement list. Send this on connect (or whenever the client wants a refresh) — the server does not push challenges automatically.
{ "type": "request_challenges" }
challenges (server → requesting client)Reply to request_challenges. Sent only to the requesting session, not broadcast.
{
"type": "challenges",
"challenges": [
{ "id": "...", "name": "...", "description": "...", "unlocked": true }
]
}
The mod sends a UDP multicast/broadcast beacon every 2 seconds:
ROR2SYNC:<ip>:<port>:<version>
It also responds to DISCOVER UDP packets on port 11421.
Both are installed automatically when using r2modman or Thunderstore Mod Manager.
RoR2ItemSync.dll in your BepInEx/plugins folder (ensure the requirements above are installed)No configuration needed. The mod runs automatically when the game starts.