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