Barriers:
LVL 1: Spikes = Minimal delay and damage - Cost = Small: 500 - Large: 1,000
LVL 2: Razor Wire = More damage and health - Cost = Small: 1,500 - Large: 2,500
LVL 3: Electric Fence = No one can pass it - Cost = Small: 2,000 - Large: 4,000
LVL 4: Laser Fence = No one can pass it and significant health - Cost = Small: 3,000 - Large: 5,000
Has a total of 8 levels with the discount levels.
Turrets:
LVL 1: Retro Turret = Turret of Retro Lancers - Cost = 1,500
LVL 2: Lancer Turret = Turret of Lancers - Cost = 2,500
LVL 3: Troika = Max firepower - Cost = 4,000
LVL 4: Shielded Troika = Protecting shield and no cooldown - Cost = 5000
Has a total of 8 levels with the discount levels.
Sentry:
LVL 1-2: The health and damage increases with each lvl - Cost = LVL 1: 1,000, LVL 2: 1,500
LVL 3: Also slows down the enemies it hits - Cost = 3,000
Has a total of 6 levels with the discount levels.
Decoys:
LVL 1: Cutout of Cole and does little to attract attention and has low health - Cost = 500
LVL 2: Adds more health and "melee magnet effect" which drags nearby enemies to go after and melee it - Cost = 1,000
LVL 3: More health and wider "melee magnet effect" - Cost = 1,500
LVL 4: Largest attraction rate and health, explodes when destroyed - Cost = 2,000
Has a total of 7 levels with the discount levels.
Silverback:
LVL 1: Silverback, no rockets - Cost = 12,500
LVL 2: Repair is 33% cheaper
Has a total of 2 levels with the discount level.