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