- Project Reclaimer multiplayer supports up to 128 players in a single match with dedicated servers.
- The standalone client runs alongside your Steam copy of Halo: MCC — no MCC menu required.
- Use the server browser to filter by map, mode, version, mods, VPN status, and latency.
- Missing content downloads automatically from the server or Steam Workshop before you join.
- Campaign co-op supports up to 16 players online with mid-session joining.
Project Reclaimer Multiplayer Overview
Project Reclaimer multiplayer is a fan-built, standalone Halo 3 PC experience layered on top of your existing Steam installation of Halo: The Master Chief Collection. Instead of launching through the MCC menu, you open the Project Reclaimer client directly, browse live servers, and connect to sessions that can host dramatically more players than standard Halo 3 matchmaking — up to 128 in supported matches.
The project is not an official Microsoft, Xbox Game Studios, Halo Studios, or Bungie product. It exists to give Halo 3 PC and modding fans a modern multiplayer hub with server browsing, expanded Forge, dedicated server hosting, and automatic mod delivery. Development is ongoing, so features and player counts may change between releases.
Video Highlights:
- Standalone Halo 3 launcher running outside the MCC menu
- Server browser with live player counts and latency
- Dedicated servers supporting persistent community sessions
- Automatic content downloads when joining modded servers
The embedded video is an official Halo-channel Reclaimer-themed trailer used for visual reference only. It is not an official Project Reclaimer trailer — none has been released as of October 2026.
Core Multiplayer Features
| Feature | Detail | Player Impact |
|---|---|---|
| Max match size | Up to 128 players | Large-scale battles beyond standard Halo 3 |
| Campaign co-op | Up to 16 players online | Squad-based campaign runs with friends |
| Dedicated servers | 127 slots per server | Persistent community-hosted sessions |
| Server browser | Map, mode, version, mod, VPN, latency filters | Find the right session fast |
| Mod delivery | Server-side + Steam Workshop auto-download | Join modded servers without manual installs |
Getting Started: From Install to First Match
Project Reclaimer runs as an independent client. It does not modify or rewrite your original MCC game files, and you never need to enter the MCC in-game menu to play.
Install the required Halo content
Install Halo: The Master Chief Collection through Steam, and make sure the Halo 3 Campaign and/or Multiplayer content relevant to your target server is installed on the same PC.
Download the Project Reclaimer client
Get the latest client from the official releases page on GitHub and place it in its own directory, separate from your MCC installation, so future updates stay clean.
Launch the standalone client
Start Project Reclaimer directly from its executable. Allow network access when prompted and wait for the server list to populate.
Set your nickname
Open the profile settings, choose a recognizable player name, and save it before joining — this is how friends and server admins identify you.
Browse and join a server
Filter by map, game type, version, or latency, pick a server with an open slot, and confirm any required content downloads before connecting.
Keep Steam installed and signed in — Project Reclaimer uses your MCC game files — but launching the MCC launcher itself is never required to play multiplayer.
Server Browser Deep Dive
The server browser is the heart of Project Reclaimer multiplayer. Each column gives you a signal about whether a session will work well for you before you commit to joining.
| Filter | What It Shows | Recommended Action |
|---|---|---|
| Map | Current map or environment | Pick familiar arenas, or explore custom maps |
| Game Type | Active ruleset or mode | Review rules before joining custom modes |
| Version | Client compatibility info | Update your client if the server requires it |
| Mods | Custom maps, Forge, or scripts used | Accept the download prompt when joining |
| VPN | Whether a network path affects access | Try non-VPN servers if connections fail |
| Latency | Network response time | Prefer lower ping for responsive play |
| Discord join | Shared addresses or invitations | Use shared details to join friends' servers |
If a server uses mods you don't have, the client obtains the missing files automatically — from the server itself or Steam Workshop. Confirm the download, wait for installation, and reconnect if the server requests a restart.
Game Modes and Custom Content
Project Reclaimer ships with scripted game modes beyond the standard Halo 3 playlist, plus tools to build your own. Content falls into four broad categories, each distributed through server sharing or Workshop subscriptions.
Map Mods
- Custom arena layouts and rotations
- Server-specific environments
- Auto-downloaded when required
Game Mode Scripts
- Gun Game, Growth, One in the Chamber
- Zone Control, Flood Infection
- JSON config + Megalo logic
Forge Creations
- Community-built arenas
- Expanded objects, AI, frozen-object editing
- STOCK, BUILT-IN, and MOD object sources
Campaign Mods
- Custom missions and story content
- Co-op playthroughs up to 16 players
- Workshop-distributed tasks
Notable Scripted Modes
| Mode | Type | Core Loop |
|---|---|---|
| Gun Game | Progression | Advance through a weapon sequence as you earn kills |
| One in the Chamber | Limited ammo | Careful engagements with restricted resources |
| Zone Control | Objective | Capture and hold zones for score |
| Flood Infection | Infection | Humans vs. Flood with role conversion |
| Growth | Player-state | Escalating power or status as the match progresses |
Start from a Slayer foundation in Megalo, add variables and events one at a time, and test each rule independently before combining systems. The built-in modes double as reference implementations.
Hosting: Dedicated Servers and Campaign Co-op
Running your own persistent server turns Project Reclaimer multiplayer from a matchmaking experience into a community hub. The dedicated server package, RCON tool, and configuration files are distributed separately from the client.
Dedicated Server Setup Essentials:
- Choose Windows, Windows Server, or Linux Docker deployment
- Configure ports, firewall rules, and NAT forwarding
- Place maps and mods in the correct server directories
- Set admin list, anti-cheat, and ban policies
- Enable automatic restarts and health checks
- Secure RCON with a strong password and restricted access
For campaign players, co-op supports solo, split-screen, and online groups up to 16. Choose the mission, difficulty, starting point, and campaign modifiers before launch, and use mid-session joining to bring friends into an active run — subject to the current checkpoint state.
Anti-cheat protections should stay enabled on public servers, and RCON access should be restricted to trusted administrators with strong credentials before opening your server to the community.
FAQ
Q: Do I need to launch Halo: The Master Chief Collection to play Project Reclaimer multiplayer?
No. Project Reclaimer runs as a standalone client that uses your existing Steam MCC installation for game files. You never enter the MCC in-game menu, and your original game files are not modified.
Q: How many players can a Project Reclaimer multiplayer match hold?
Supported matches can host up to 128 players, and campaign co-op supports up to 16 players online. Dedicated servers offer up to 127 slots for persistent community sessions.
Q: What happens when I join a server that uses mods I don't have?
The client detects the missing content and downloads it automatically, either from the server itself or through Steam Workshop. Confirm the download, let it install, and reconnect if prompted.
Q: Is Project Reclaimer an official Halo product?
No. It is an independent fan project for Halo 3 PC players and is not affiliated with Microsoft, Xbox Game Studios, Halo Studios, or Bungie. The project is currently in early development, so features may change between releases.
Q: Can I host my own Project Reclaimer server?
Yes. The dedicated server package supports Windows, Windows Server, and Linux Docker deployments, with RCON for remote administration, configurable maps and mods, and anti-cheat and ban management.
Visit the official How to Play guide, the Forge overview, or the dedicated server hosting guide for step-by-step instructions. Community discussion and updates happen primarily through the official Discord linked on projectreclaimer.dev.