In this game, you play the role of Derek Green. You are a B-Rank starship trooper, who has been assigned to travel to far away planets. In your conquest you come across different planets with tons of resources, but no inhabitants. One day, you landed on a planet which seemed empty at first. But then the inhabitants started showing up and they were not friendly. Now you have to fight them off.
Destroy the incoming attacks with the help of your troops. You have gunners, stingers, snipers etc who needs to be placed at strategic locations to ward-off the enemy.