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