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