If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The world climate is deteriorating, and there's only one piece of land suitable for the human race to survive. Yet at the same time the aliens are fighting over this land with you too! Thus the war began...The Last Shelter is a cool tower defense game. Your aim to protect the last shelter of mankind from invading alien bugs. Buy weapons and build various gun towers on the given energy-powered ground.