Here is the full list of all 22 MaDevil achievements.
Complete the beach.
Complete the ravine.
Complete the harbor.
Complete the swamp.
Complete the gates.
Complete the city.
Complete the underground.
Complete the fortress.
Complete the game.
Complete the game on the highest difficulty.
Complete the game using no melee weapons.
Complete the game without purchasing skills.
Complete the game without using methods to reduce your madness.
Complete the game using no ranged weapons.
Complete the game without killing enemies.
Complete the game without healing after the first level.
Complete the game without consuming animal-based food.