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