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