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