: Visit the Killhouse from the main menu to earn permanent weapons like the Crossbow (complete parkour under 45 seconds) and the M1911 (take down all targets).
: Use the permanent code 1947 at the Isolation Vault to unlock the AK-47. Efes Survive and Kill the Killers in Area 51 GUI
: Utilize hit-and-run tactics and environmental cover to handle waves of killers in modes like Endless Survival . : Visit the Killhouse from the main menu