In the level Halo, as you are walking to that one building, you see a pipeline like thing the Arbitar does not go to. Go to it. Cortana will say "Hey where are you going?" You will see a cave; jump to it. In the cave when Cortana says "Hey whats that?" a panel opens and you will see an orange ball. Walk to it, press x, and you see messages.But also if you have two players have one jump on top of the other players there will be a hole on the right gernade jump with the player still on then you will jump on the little thing now jump to the other one look to your left its a floating man who went missing this is master 1354 happy easter hunting.