New Permanent Skill Branches
Two new permanent upgrade branches expand battlefield control and defensive options.

• Fire Bullets for Wall Turrets

When this upgrade is unlocked, wall-mounted turrets will ignite zombies with incendiary ammunition, causing them to burn and take additional damage over time.
• Voice Trap

A deployable loudspeaker trap that emits powerful sound waves. Zombies within its range will be attracted to the device and move toward it, allowing players to manipulate enemy paths and create more strategic defensive lines.
• New Permanent Upgrades
Fire Turrets now burn zombies, and the new Voice Trap allows you to lure and redirect enemies across the battlefield.