Co-op Horror Survival System – Easy Multiplayer Template

About Co-op Horror Survival System – Easy Multiplayer Template – Unity Editor Tool & Plugin

Unity Co-op Horror Template and Multiplayer Framework

Co-op Horror Survival System – Easy Multiplayer Template delivers a foundation for cooperative survival games, structured around a host-authoritative network architecture. Built on Netcode for GameObjects, the package provides a complete gameplay loop encompassing match lobbies, objective-driven missions, cooperative extraction, and persistent player progression.

Designed as an extensible Unity co-op horror template, the framework features server-validated player movement, interactions, and physical simulations. Players navigate environments using a first-person controller equipped with stamina, crouching, sprinting, and footstep noise generation that directly alerts nearby threats. At the core of this multiplayer horror system is an interactive world featuring dynamic power circuits with fuses, breakers, generators, emergency lighting, and networked physics props that can be carried, dragged, or thrown collaboratively.

Included Systems and AI Architecture

The framework combines survival mechanics, network infrastructure, and hostile creature logic to support cooperative sessions:

• Lobby and Network Management: Supports LAN sessions immediately alongside integrations for Unity Relay, Unity Sessions, and Vivox proximity voice chat. Includes lobby interfaces with ready-up validation, mission and difficulty selection, in-game text chat, late-joining capabilities, and disconnect handling.
• Survival and Health Mechanics: Tracks health and sanity levels alongside downed player states, team revive interactions, and spectator viewing modes.
• Investigation Equipment: Equips players with network-synced tools including flashlights, UV lights, EMF readers, cameras, and spirit boxes.
• Server-Validated World Interactions: Manages synchronized environmental elements such as doors, key items, digital keypads, levers, containers, and hiding spots.
• Autonomous Creature AI: Includes four distinct enemy archetypes—Stalker, Brute, Wraith, and Mimic. Entities utilize vision, hearing, route investigation, active pursuit, area searching, and hiding-spot inspection behaviors.
• Developer Tooling: Built using modular C# code organized with assembly definitions, an event bus architecture, custom editor builders, a package validator, and automated multiplayer testing utilities.

Use Cases

• Suitable for teams developing a multiplayer horror system centered on item collection, paranormal evidence gathering, and extraction mechanics.
• Can support cooperative puzzle games that require synchronized physics interactions, power grid restoration, and team-revive dynamics.
• Useful for projects needing an established Netcode for GameObjects foundation with functional lobby systems, session migration, and proximity communication.

FAQ

What online services are required for matchmaking and voice chat?

While local LAN connections work immediately without external accounts, online multiplayer through Unity Relay/Sessions and proximity voice communication through Vivox require linking your own Unity Cloud project.

What behaviors do the included creature types exhibit?

The four creature archetypes (Stalker, Brute, Wraith, and Mimic) are driven by sensory systems that detect player footsteps and visual lines of sight. Each creature handles state transitions across idle patrolling, noise investigation, active chase, area searching, and checking player hiding spots, and can be extended using custom creature classes.

What interactive hazards and traps are provided?

The framework includes eight specific environmental threats: bear traps, tripwires, electrified water, falling crates, and supernatural events, all synchronized across clients.

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