Borderlands: The Pre-Sequel All Athena Heads Ckecklist

Default Heads

Bounty Hunter

Mission reward from The Voyage of Captain Chef

Eagle's Shroud

Mission reward from Cleanliness Uprising

Bubblegunner

Rank 5 Death From Above challenge

Life Support

Rare drop from RedBelly

Fortified

Rare drop from The Bosun

Tech Ninja

Rare drop from Colonel Zarpedon or The Empyrean Sentinel

Gynoid Agent

During story mode only, rare drop from Felicity Rampant

Champion of Eleseer

Mission reward from The Beginning of the End

Herald of the Eridian Night

Mission reward from The Bestest Story Ever Told (on true Vault Hunter mode)

Guardian Teeth

Mission reward from Digistructed Madness: Round 2 in The Holodome Onslaught and can be dropped from Guardian Pondors.

Born to Kill

Rare drop from 5H4D0W-TP

Level Cap

Mission reward from You Can Stop the Music in The Nexus.

Guard of the Trickster

Legendary drop from 5H4D0W-TP

Fowl Mood

SHiFT code reward on Thanksgiving 2015 (No Longer Obtainable)

Stay Frosty

SHiFT code reward on Christmas 2015 (No Longer Obtainable)

Vallory's Violence

Reward for having a save in Tales from the Borderlands