Defend the bunker in a wasteland siege that started for no reason, building facilities and using tower defense techniques to protect it. Soldiers from inside know their survival depends on their strength and capacity of defending their last stand. From left and right, enemies will come in waves and only by quickly building better towers and using upgrades to make them stronger they will survive. The shooting comes out automatically. While they pierce invaders with bullets, use the Mouse to explore the many options that still can be found, even when their forces are all concentrated in this abandoned wasteland.