You have to find the ancient stone tablet that contains information about the Founders and how to awaken the Guardians. The tablet is in pieces at a couple of locations on the island. Once the pieces have been found you combine them. Your next task is to translate the tablet - you need to find another ancient piece of technology buried deep in the island. Once the tablet is translated you must activate the stone tablet device to awaken the Guardians. This needs to be done before the earth dies.
Please use spoilers to give hints:
[spoiler=Title Here]Enter text here...[/spoiler]
Please do not post a video walkthrough for 7 days.