Here is the full list of all 24 Soda Dungeon achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Steal essence from an enemy.
Complete 100% of the bestiary.
Complete dungeon level 1000.
Complete 50 levels with only one Soda Junkie.
Reflect 100 damage from a single attack.
Complete dungeon level 750.
Win a battle by only defending.
Complete dungeon level 500.
Inflict burn, sleep, poison, and confusion on one enemy.
Find a legendary item.
Hope you're hungry.
Purchase all basic sodas.
Complete dungeon level 250.
Have one Knight defend for another Knight.
Complete 100 levels in one trip.
Complete dungeon level 100.
Find a rare item.
Complete 50% of the bestiary.
Sell 100 items.
Enter a battle in the Arena.
Slay 500 enemies.
Slay 10 bosses.
Discover and explore an alternate path in the dungeon.
Complete your first dungeon trip.