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