Here is the full list of all 59 Brutal Legend achievements. It takes around 35-40 hours to unlock all of the achievements on Windows.
Spend 250,000 fans - any mode
Achieve 100% completion on the stats screen
Complete all hunting secondary missions
Ride a Razorfire Boar into the Sea of Black Tears and live to tell the tale.
View all Legends
Free all 120 Bound Serpents
Make out with Ophelia while wearing the Mountain Man Threads.
Visit the grave of a fallen hero while wearing the Black Metal Threads.
Unlock all songs in the Mouth of Metal
Complete Campaign mode on Brütal
Kill 20 Drowning Doom units with the Eye of Sorrow.
Acquire 3,000 Fire Tributes
Slay 150 enemies with the Deuce - any mode
Run down 20 animals in the Deuce with the Coiling Maw equipped.
Kill 20 Tainted Coil units with the Disgorger.
Complete 20 ambush, outpost defense, or mortar secondary missions
View all vistas
Learn all guitar solos
Summon all Motor Forges
Complete all racing secondary missions
Kill 15 enemies with a Metal Beast while wearing the Zaulia Threads.
Ride one of every ridable animal.
Free 80 Bound Serpents
Jump over a Hextadon in the Deuce
Gain 5 or more seconds of hang time in a single jump - any mode
Free 40 Bound Serpents
Chisel four Razputin heads onto Mt. Rockmore.
Kill a Tollusk using only Ground Urchins
Win a single-player Stage Battle against the AI using only orders
Win an AI stage battle - Brütal difficulty
Win an AI stage battle - any difficulty
Kill 20 enemies with one Bleeding Death
Double Team with every Tainted Coil unit
Hit 15 enemies with one Agony Ball using the Pain Lifter's Double Team
Double Team with every Drowning Doom unit
Hit 6 enemies with the explosion from a Brood's Double Team
Double Team with every Ironheade unit
Kill 25 enemies with the grinder of one Rock Crusher
Trap 15 enemies in one ring of fire with the Fire Baron's Double Team
Win 50 match-made multiplayer battles.
Play with or against another player who has this Achievement
Win 10 games on Hammer of Infinite Fate maps - ranked or vs. the Brütal AI.
Win 10 match-made multiplayer battles.
Play a multiplayer game on all Hammer of Infinite Fate multiplayer maps.
Win a ranked multiplayer match
Purchase all upgrades in the Motor Forge
Complete Campaign mode on Gentle
Complete Campaign mode on Normal
Complete "Sea of Black Tears"
Personally smote 300 enemies - any mode
Complete "Dry Ice, Wet Graves"
Complete "It's Raining Death"
Complete "Sanctuary of Sin"
Complete "Pilgrimage of Screams"
Complete "Battle for Bladehenge"
Complete "Welcome to the Age of Metal"
Purchase 1 upgrade in the Motor Forge
Complete "Lair of the Metal Queen"
Complete "Exploited in the Bowels of Hell"