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