Balancing

• boss zombie has a 50% chance to spawn after round 20
  
• boss zombie spawns near the player instead of a random position
  
• boss zombie always drops max ammos
  
• boss zombies health scales with the round
  
• the boss zombie in the vault lockdown has an increased and fix health amount
  
• boss zombies passed round 20 wont spawn if one is already on the map
  

Quality of Life

• Added option to disable flashing lights in display settings
  
• Muzzle flash toggle in display settings also hides the muzzle flash image
  

Bugs

• cluster mine buy sorting layer fix
  
• acid zombie wont melee attack you while he's dying