The Long Hunt: a server-authoritative zombie ecology for B42.20.4. Version 2.2.1 preserves the climber, breacher, Stronghold, corridor-wander, and Chorus intel systems while repairing the vault-lunge 2D blend IDs that could terminate a dedicated server during its first zombie initialization. The optional Java accelerator remains optional; Echoes of Humanity and My Only Friend are optional peers.