Halo: Reach Forge Is Local-Only — No Online Matchmaking or Map Sharing

No. Halo: Reach's Forge mode is local-only (single-player or split-screen/System Link). It has no online matchmaking, session hosting, or map-sharing via Xbox Live.

Local Multiplayer Forge

• Split-screen: Up to 4 players on one console.
• System Link: Connect multiple Xbox 360s via LAN for shared editing.

Online Forge in Later Halos

• Halo 4: Forge + online custom games (no persistent map sharing).
• Halo 5: Guardians: Full Forge, online custom lobbies, file share for maps/modes.
• Halo Infinite: Forge (beta → full), cross-play, file browser, seasonal content.

For collaborative online map-making today, Halo Infinite is the destination.