Fix: Modern Warfare 2 (2009) Slow/Failed Matchmaking on Xbox 360

MW2 (2009) on Xbox 360 uses peer-to-peer matchmaking via Xbox Live (Demonware). Common fixes:

1. Network Basics

• Wired Ethernet: Mandatory for host quality. Wi-Fi adds jitter → host migration loops.
• Open NAT: Settings → Network → Test NAT Type. Must be Open. Moderate/Strict = no host, slow join, lobby drops.
• UPnP Enabled: Router setting. Auto-opens ports.
• Port Forward (Manual): UDP 3074 (Xbox Live), UDP 30000-30050 (Demonware/Game). Static IP on console.

2. Game-Specific

• Clear Cache: System Settings → Memory → Highlight HDD → Y → Clear System Cache. Removes corrupt title updates.
• Delete Title Update: Same menu → Games → MW2 → Delete Title Update. Re-launch → Re-download (fixes bad patch).
• Install to HDD: Y on game → Install. Faster map loads, less disc seek lag.
• DLC Parity: All players in party must have same Map Packs (Stimulus, Resurgence). Mismatch = cannot join.

3. Xbox Live Service

• Check Xbox Live Status — "Xbox 360 Multiplayer" green?
• MW2 360 servers (Demonware) still up but low pop. Peak: 7–11 PM local.

4. Backward Compatibility (Better Option)

• Play MW2 (2009) on Xbox One/Series X|S via Backward Compatibility.
• Benefits: Faster CPU → 60 FPS locked, faster matchmaking (larger pooled pop with BC players), Auto HDR, Quick Resume.
• Same disc / digital license works.

5. If All Fails

• Power cycle modem/router/console (30s unplugged).
• Test other games (Halo 3, BO2) — if they work, MW2 pop is just low.
• Try "Custom Match" → "System Link" over LAN (Xlink Kai / Parsec) for private lobbies.

MW2 360 is playable but fragile. BC on Series X is the definitive way.