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 50 levels with only one Soda Junkie.
Hope you're hungry.
Win a battle by only defending.
Complete dungeon level 1000.
Complete 100% of the bestiary.
Complete dungeon level 750.
Reflect 100 damage from a single attack.
Complete dungeon level 500.
Find a legendary item.
Inflict burn, sleep, poison, and confusion on one enemy.
Complete dungeon level 250.
Purchase all basic sodas.
Complete 100 levels in one trip.
Have one Knight defend for another Knight.
Sell 100 items.
Find a rare item.
Complete dungeon level 100.
Complete 50% of the bestiary.
Slay 500 enemies.
Slay 10 bosses.
Enter a battle in the Arena.
Discover and explore an alternate path in the dungeon.
Complete your first dungeon trip.