Description: The first DLC for the unique real-time naval strategy game Oil Rush features a completely new tower defense game experience, including a tower defense co-op mode. Exploit new strategies with completely new technology tree, assault and defense units. The Oil Rush is never over! Key Features: - 5 challenging Tower Defense maps with relentless waves of furious enemies - A completely new game experience Tower Defense multiplayer co-op for up to 3 players - Brand new Technology tree makes completely new strategies possible - New unit: Raiders Catamaran great for fast hit-and-run strikes - New tower: Heavy Mortar Turret the ultimate in naval defense