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