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