Caves and End game
There are many entrances for caves whether it be a opening in or a hole. There are 10 different caves that progress the game/story.
Each cave has it's own tools and story items as well as some contain enemies ranging from a few mutants to some having bosses
After going through all the caves, you will most likely find yourself carrying a variety of weapons and tools now and heading to the last cave- the pit. The pit has 2 entrances and where once you make it down; you will have to go into the center body of water and swim into a hole which leads you to the labatory.
The labatory is considered the final piece of the map also known as the end game. Here you will find a completely looking part of the map unlike the island; it's all advanced. The labatory covers the rest of the story which can be considered 50% of it. Where you will discover what the Sahara staff have discovered, experimented on, as well as even find your son Timmy. You will find out that he is gravely injured and needs to be treatly.. the only way possible is to find a catalyst similar to a child. You will finally make your way through the labatory and make it into a boss-like room. There you will find a little girl who turns out to be a mutated monster. This is considered the final boss. After defeating it, you will receieve a key card that takes you to the final location, a floating facility in the sky above the island that seems to be what makes planes crash. This is where you decide to save Timmy by allowing the device to take down another plane or choose to shut the system down and continue living on the island and your son dies.