Wall Tower: Limit (2)
Can only be placed on pathway and is destroyed upon reaching 0 health
Can be healed by medics every wave
Medic Healing Rate only effects the incoming healing to the wall and not to the base
Medic Healing Rate does not effect Worker Healing

lvl 0: "Wooden Wall"
Medic Healing Rate: x1
Health: 50
Cost: 250

lvl 1: "Defensive Fortifications"
Medic Healing Rate: x2
Health: 150
Cost: 750

lvl 2: "Armed Guards"
Medic Healing Rate: x3
Adds 2 Level 1 Minigunner Guards to the wall
Health: 500
Cost: 2500

lvl 3: "Workers"
Medic Healing Rate: x4
Adds workers that repair your wall at 1 health per second
Upgrade Minigunner Guards to Level 2
Health: 1500
Cost: 5000

lvl 4: "Advanced Training"
Medic Healing Rate: x6
Workers repair your wall at 5 health per second now
Upgrade Minigunner Guards to Level 3
Health: 6000
Cost: 15,000

lvl 5: "Space Age Technology"
Medic Healing Rate: x8
Workers repair your wall at 25 health per second now
Upgrade Minigunner Guards to Level 4
Health: 12,000
Cost: 30,000