Instructions
Talk to the Diga Chieftain and accept his mission to enter the Digadigamid. Travel to the Digadigamid.
Defeat the enemies that block your path until you have beaten the dog. You will find yourself at a dead end after defeating the dog.
Break the lighter-colored bones to continue forward. This will open a tunnel with a long-nosed man at the end that you must battle. The man will open a trapdoor beneath you after you defeat him.
Talk to Nevada Montecarlo when you wake up. This will be the first room you're trapped in. Use your sonar to find the Keymonite fossil that is hidden underground. Dig up the fossil and clean it off; Nevada will use it to unlock a ladder and a door when it's clean.
Climb the ladder and enter the next tunnel. You will encounter the dog and the long-nosed man again, along with a woman named Vivian, at the end of the tunnel. They will run away and trap you again.
Listen to the strange message you receive after you become trapped. You may have to read it from bottom to top and right to left to decipher it. It reads: "A secret tunnel hides between the two unbreakable bones! Dig."
Walk to the two unbreakable fossils. They will look like large black bones. Use your pickaxe between them to open a secret tunnel. Drop down and it will return you to the temple's entrance. Here you must face Vivian one final time. You will be able to leave the Temple when you win.