• New Level 5 and Level 6
  • New polar bear behavior
  • Soundtrack with a track for each level
  • New Jersey sprites (chemical plant)
  • Washington DC sprites (buildings, white house)
  • Vast Level 2 improvements
  • Extremely major performance improvements (Level 3 now contains 200+ zombies)
  • Terrain avoidance (player can't cross toxic waste, polar bear won't cross ice)