Here is the full list of all 40 The Vagrant achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Unlock all achievements
Acquire all skills
Collect 1000000 mana
Failed to defeat Kumasith
Defeat Soulreaper
Acquire an onion from the chef in Brocley village
Keep drinking potions
Collect 1000000 gold
Achieve true ending
Unlock all entries in Monsterpedia
Acquire a weapon or armour with 4 runestones
Acquire Sword of verum
Defeat Fallen Kumasith
Achieve normal ending
Clear the game in Hard difficulty
Unlock all entries in Note
Defeat Valerie
Unlock all abilities
Explore all areas
Acquire all recipes
Consumed 100 potions in total
Defeat Shroom prime
Failed to defeat Shroom prime
Defeat Ground shaker
Stop Soulreaper
Failed to stop Soulreaper
Achieve 999 combos
Achieve 500 combos
Defeat Santiago
Slay the chicken
Acquire a max ranked weapon or armour
Failed to defeat Santiago
Defeat Headless horseman
Slay 666 monsters
Defeat Kumasith
Defeat Maximillian II
Defeat HMWV
Defeat Esgonian general
Fight Soulreaper
Achieve 100 combos