The Last Shelter is a high-quality tower defense game created by Toffee Games and sponsored by Notdoppler. Defend your base against waves of aliens by building weapons on energy-powered surfaces. Kill the bugs to gain resources, which are required for building, upgrading, and repairing weapons. You also have air support, which doesn't cost resources, but must recharge after it is called in. When you complete a mission, you'll receive experience points that can be spent on research.