Last remnants of humanity, survivors of the nuclear cataclysm are under constant attacks by mutated monsters.

Threat comes from underwater caverns near the Base - and you are to clear these caves and fight their dwellers.

You will be provided with an ichtis (a battle suit) and range of weapons - but most lethal weapon is your mind and tactical prowess.

- Learn from your mistakes - new enemy will bring new tools to combat; knowledge is key to besting them.

- Choose your weaponry - each fight is unique, your opponent will require individual setups and fighting style.

- Plan, analyze, and adapt! - timely execution of your abilities will be crucial to survival and ultimate victory.