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