Here is the full list of all 65 Asura achievements.
Finish the game in Shaitan Difficulty.
Reincarnate
Unlock 10 Shastras.
Absorb 100 enemies.
Reach Level 10.
Open a Demon chest.
Clear an Arena room.
Open an enemy chest.
Absorb 25 enemies.
Destroy 100 pots.
Scavenge 100 enemies.
Clear a guardian room.
Scavenge 25 enemies.
Destroy 25 pots.
Equip item and fill the slots in inventory including consumables.
Successfully cast an active skill in the game.
Forge an item.
Clear a room of enemies.
Kill all bosses!
Finish the game only with default weapons.
True ending
Finish the game in Rakshas Difficulty.
Finish the game in Asura Difficulty.
Absorb 1000 enemies.
Collect 15,000 gold.
Scavenge 1000 enemies.
Destroy 1000 Pots.
Defeat the boss without killing any other enemy.
Complete the game without taking any damage.
100% the game.
Purchase an item from the store on discount.
Purchase every single item from the store.
Collect 500 gold in a single run.
Cast a shield spell.
Clearing a run without consuming any meat or potions.
Unlock 50 Shastras.
Unlock all Shastras.
Forge all items.
Forge all items in a single run.
Select all Yodha shastra in a run.
Select all Dhanush Shastra
Select all Bal Shastra.
Select all Mantra Shastra
Kill all champs!