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