One of 3 Research Upgrades types, Trap Research Upgrades enhance the players base defense abilities. Most upgrades unlock advanced traps while a few others give defense boosts to all traps.

Fortifications Expert
Watch Tower
Spike Strip2
Barbed Wire2
Defense Durability
Defense Power
Trip Wire
Razor Wire
Sentry Turret
Sniper Nest
RPG Nest
Machine Gun Nest

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