NetworkingReworked

NetworkingReworked is a BepInEx Harmony patch for the Unity-based multiplayer game REPO, designed to overhaul the network physics and ownership model. If you're tired of the clunky delay and desync when playing REPO as a client, this mod turns multiplayer into something that actually feels responsive — more like singleplayer with friends.

Important Notes

All players (host and clients) must have this mod installed.
Incompatible with server-sided mods that expect strict host authority.
If you experience any regressions, glitches, or odd behaviors — let me know on Discord: @readthisifbad

What This Mod Does

REPO was designed with a heavy host-authoritative model, meaning the host controls almost all physics behavior. This results in extremely high input latency for clients, especially during physics-heavy interactions.

This mod:

Replaces host-only logic (e.g., PhotonNetwork.IsMasterClient) with per-object ownership checks (PhotonView.IsMine)
Allows clients to simulate and control objects they own
Introduces predictive ownership transfer logic for grabbing and collisions
Syncs object state manually during ownership transitions to avoid flickering or glitches
Stabilizes physics behavior for carts, doors, valuables, and other interactive objects
Adds ping-compensated ownership logic, giving control to the player with the best connection
Allows for predictive collision-based ownership handoff
Syncs hinge state and other special-case physics features on transfer

In short: clients now behave almost identically to the host, removing most of the jank normally seen in REPO multiplayer.

What is Photon?

Photon Unity Networking (PUN) is a real-time networking framework for Unity. In REPO, each interactive object has a PhotonView that determines who owns and simulates it.

By default, REPO assigns almost everything to the host (MasterClient), leading to major latency. This mod gives that authority back to clients when appropriate, leading to better responsiveness and smoother gameplay.

How REPO Networking Works

Normal Photon Networking Sequence

Multiplayer traffic in REPO is routed through Photon. The host (MasterClient) is the source of truth. When a client interacts with something:

The client sends an event to the host
The host processes it
The host sends back the result

This introduces a full round-trip delay before anything meaningful happens, which is especially bad for physics.

This mod removes most of that round-trip logic and lets clients act directly on what they own.

NetworkingReworked

Patched Behaviors

System	Behavior	Fix
`PhysGrabObject`	Grab/release logic	Ownership handling, syncing, ping prediction
`PhysGrabHinge`	Hinged object physics	Prevents joint destruction, adds hinge syncing
`PhotonTransformView`	Transform syncing	Prevents transform glitches during transfer
`PhysGrabCart`	Pulling and state transitions	Client-sided authority, ping-buffered control
`PhysGrabObjectGrabArea`	Grab detection	Ensures detection runs on the client side
`OwnershipTakeoverHelper`	Authority handoff monitoring	Predictive ownership, stabilization, ping-based resolution
`ImpactSyncHandler`	Impact velocity/rotation sync	Manually synced collisions
`PhotonView.TransferOwnership`	Ownership change	Applies physics state and grab fixups on transfer
`PredictiveOwnershipCheck`	Pre-impact ownership transfer	Detects physics collisions before they happen

Known Issues

Scripted Valuables

Some valuables with custom scripts might behave incorrectly. Let me know which ones and I'll patch them.

Carts

Spamming grab can occasionally result in the host regaining ownership. Wait a moment and try again if this happens.

Setup Instructions

Install BepInEx into your REPO installation folder.
Place this mod's .dll into the BepInEx/plugins folder.
Launch the game and join a multiplayer session. All players must have the mod installed.