Here is the full list of all 30 Astalon: Tears of the Earth achievements.
Unlocked all secrets in the game and beat all the unlockable modes.
Defeated all the bosses in the Boss Rush mode.
Defeated the Black Knight as the Gargoyle.
Killed 5000 monsters.
Reached the top of the tower as the Black Knight.
Purchased all character specific deals in the shop.
Purchased all of Bram's deals in the shop.
Purchased all of Zeek's deals in the shop.
Purchased all of Kyuli's deals in the shop.
Purchased all of Arias' deals in the shop.
Purchased all of Algus' deals in the shop.
Completed 80% of the bestiary entries.
Completed all entries in the bestiary.
Completed 20% of the bestiary entries.
Completed 50% of the bestiary entries.
Defeated the Black Knight.
Finished the game with 100% completion.
Defeated the Gorgon Medusa.
Explored 100% of the tower's rooms.
Gathered 100% of the tower's items.
Defeated the Gorgon Solaria.
Collected 50000 orbs.
Unlocked the gorgonslayer Bram.
Defeated the Gorgon Gemini.
Killed 1000 monsters.
Collected 10000 orbs.
Unlocked the collector Zeek.
Defeated the Gorgon Volantis.
Found the secret ending.
Defeated the Gorgon Tauros.