Defend your base from what lurks in the darkness!

You are an inventor trying to harvest the powers of the black runestone. But the creatures of the dark do not seem to like  what you are doing. Your past defensive measures weren't enough -  the shield around your base will not survive the continuous attacks. You need to fight back. Now!

Fight the enemies that storm your base. Get upgrades for your machines. Fire the flare to get buffs. And most importantly - survive as long as you can!