Surival Instincts (SI) is an open world survival game. When you first play, you are thrust into a dangerous world full of radiation and genetically mutated spiders. You have only one goal. Survive. To do so, you will need wit, fast thinking, and courage. Unlike many survival games, SI focuses on a more in depth survival system. It is hard to live for several days, let alone several weeks. One must scavenge water, food, and supplies (e.g. First Aid Kits, Ammunition, Metal, etc.).