Full list of all 46 Gauntlet Slayer Edition achievements. It takes around 40-50 hours to unlock all of the achievements in the base game on Windows.
The base game contains 43 achievements, and there is 1 DLC pack containing 3 achievements.
Kill The Boss of the Crypts
Die by taking damage from a Spike Trap
Die from Area Damage
Kill 50000 Monsters With One Hero
Destroy the Food 500 Times With One Hero
Drop the Crown 200 Times With One Hero
Destroy 800 Props With One Hero
Destroy 5000 Props With One Hero
Eat food equal to 6000 health in total With One Hero
Die 100 Times With One Hero
Die 8 Times in one session on a single Floor
Die while Frozen
Die by taking Area Damage from an Explosive Barrel that you are Carrying
Die by taking damage from a Blade Trap
Kill 12000 Monsters with Warrior Weapon Abilities
Tackle 500 Monsters using Rush - Warrior
Take 15000 Cumulative Damage as the Warrior
Kill 12000 Monsters with Elf Weapon Abilities
Kill 500 Monsters with Magic Arrow or Sniper Shot - Elf
Take 10000 Cumulative Damage as the Elf
Kill 12000 Monsters with Valkyrie Weapon Abilities
Block 100 projectiles with Shield Block - Valkyrie
Take 12000 Cumulative Damage as the Valkyrie
Kill 8000 Monsters while they are Frozen or Chilled
Kill 8000 Monsters with Fire Spells
Kill 8000 Monsters with Lightning Spells
Take 10000 Cumulative Damage as the Wizard
Complete all Crypt Levels on Hard
Kill 15000 Mummies With One Hero
Kill 15000 Skeletons With One Hero
Kill 50 Liches With One Hero
Kill The Boss of the Caves
Complete all Caves Levels on Hard
Kill 15000 Grunts With One Hero
Kill 15000 Orcs With One Hero
Kill 50 Spider Queens With One Hero
Kill The Boss of the Temple
Complete all Lava Levels on Hard
Kill 15000 Cultists With One Hero
Kill 15000 Demons With One Hero
Survive until Floor 10 in Endless Mode
Survive until Floor 25 in Endless Mode
Survive until Floor 50 in Endless Mode
Ghostwalk through 500 enemies - Necromancer
Summon 1200 Undead Minions - Necromancer
Take 10000 Cumulative Damage as the Necromancer