I found a little skull behind the waterfall. Couldn't interact it, disappeared after shooting a few times. Was it meant to do something?

Not much of a secret but in the corner of the map on the beach is the other crashed pelican from the cut scene, with a regular warthog and a bolt action sniper rifle. On a nearby hill also sits a machete with a marker on the ground.

Found the Energy Sword ;)

Glad to finally have a place to talk about this! There is one skull hidden on each Island. Once all 4 are shot, the stealth tank and kestrel will spawn in. Starting island was probably the trickiest to find

Also, @Scatman The machete changes based on difficulty. Legendary will spawn two machetes and a dead elite to create the legendary symbol on the ground.

Where do you find the energy sword? And where is the skull on the starting island? I searched for at least half an hour :(

Originally posted by jek porkins:

Where do you find the energy sword? And where is the skull on the starting island? I searched for at least half an hour :(

The skull is hidden under the Pelican. And I'm pretty sure picking up both machetes makes the energy sword appear. It's stuck in a rock near one of the terminals you have to activate.

Could be mistaken but I thought i heard a rendition of the Arbiter's theme playing.

Edit: Actually I don't think the machetes have anything to do with the energy sword. I played it again and it appeared after getting all the skulls. I think the song and legendary symbol is a separate Easter egg.

So I found all four skulls but I can't find where the kestrel or stealth tank spawn in

@dexter it spawns behind the cliff that the skull on top of the flat rock spawns on.

There's what looks like an elevator shaft in the room where the final encounter takes place. Anyone been down there?

https://youtu.be/ZibAmIcL0bg Hopefully my tutorial help you guys out

Originally posted by n3lioconvoy:

There's what looks like an elevator shaft in the room where the final encounter takes place. Anyone been down there?

I used the agrophobia skull to get down there, unfortunately there's nothing at the bottom of the shaft. The shaft is extremely deep though, deeper than any chasm/shaft in the original game I think!