Here is the full list of all 34 Path of Survivors achievements.
Unlock the Bubble Ability
Unlock the Centaur Class
Unlock the Ping Pong Shuriken Ability
Unlock the Ricochet Ability
Unlock the Cross Bone Ability
Unlock the Piercing Orb Ability
Unlock the Bullet Ability
Unlock World 2
Unlock the Sword Throw Ability
Unlock the Flare Ability
Unlock the Icespike Ability
Unlock the Saw Ability
Unlock the Flamethrower Ability
Unlock the Bolt Ability
Unlock the Knight Class
Unlock World 3
Unlock the Snake Attack
Unlock the Scorch Arrow Ability
Unlock the Tornado Ability
Unlock the Bone Swarm Ability
Unlock the Beam Fire Ability
Unlock the Lightning Ground Ability
Unlock the Assassin Class
Unlock World 4
Unlock the Soul Shatter Ability
Unlock the Nether Ground Ability
Unlock the Agony Ability
Unlock the Shadownova Ability
Unlock the Obliterate Ability
Unlock the Void Pulse Ability
Unlock the Mage Class
Unlock World 5
Unlock the Sorcerer Class
Unlock World 6