Description
Multiplayer Proof Video:
Documentation Included:
A professional PDF guide is included with the listing. It covers setup, usage notes, multiplayer interaction flow, door/pickup/button examples, replication behavior, late-join behavior, and integration guidance for existing UE5 multiplayer projects.
Documentation link:
https://drive.google.com/file/d/1UBRjaQHL_Fpvuu0GI49_tl14Cl42y_c9/view?usp=sharing
UE5 Interaction System for multiplayer Unreal Engine projects.
CF3 Interaction Authority is a server-authoritative interaction plugin designed for multiplayer projects where doors, pickups, buttons, and interactable
actors need to stay correct across clients.
This system is built around server validation and replicated world state, not client-side interaction tricks.
What this plugin is built for:
- Multiplayer door interaction
- Multiplayer pickup interaction
- Multiplayer button interaction
- Server-authoritative interaction requests
- Replicated target state
- Late-join safe reconstruction
- Optional interaction prompt UI
- Clean component-based integration
- Dedicated-server-friendly interaction flow
- No forced full framework takeover
Core interaction flow:
Client presses interact
→ owned Interaction Authority Component sends the request
→ server validates the target, range, interface, and optional line of sight
→ server executes the interaction
→ the target actor owns and replicates its state
→ clients and late joiners rebuild from the current replicated state
Included example actors:
- Replicated door actor
- Replicated pickup actor
- Replicated persistent button actor
- Momentary button example
- Demo character setup
- Optional prompt widget / demo UI
- Example interaction flow for doors, pickups, and buttons
Multiplayer focus:
- Server validates interaction requests
- Clients send intent, not final authority
- Target actors own their replicated truth
- Persistent state is late-join safe
- Pickups can be consumed without late-join ghosting
- Doors and persistent buttons rebuild correctly from replicated state
- Momentary interactions remain transient by design
Good fit for:
- Multiplayer survival games
- Co-op games
- Shooters
- RPGs
- Extraction games
- Dungeon crawlers
- Sandbox projects
- Door, pickup, button, and usable actor systems
Not included:
- Full inventory system
- Quest system
- Dialogue system
- Save/load system
- Lockpicking system
- Physics grabbing system
- Vehicle interaction system
- Full gameplay framework
CF3 Interaction Authority focuses on one job:
reliable UE5 multiplayer interaction logic with server validation, replicated state, and no desync-prone client shortcuts.
The strongest design rule is simple:
Client sends intent.
Server validates.
Target state replicates.
Late joiners reconstruct correctly.