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.
Inflict burn, sleep, poison, and confusion on one enemy.
Complete 50 levels with only one Soda Junkie.
Purchase all basic sodas.
Complete dungeon level 1000.
Complete 100% of the bestiary.
Complete dungeon level 750.
Have one Knight defend for another Knight.
Find a legendary item.
Complete dungeon level 500.
Reflect 100 damage from a single attack.
Hope you're hungry.
Steal essence from an enemy.
Complete dungeon level 250.
Find a rare item.
Complete 100 levels in one trip.
Complete dungeon level 100.
Complete 50% of the bestiary.
Sell 100 items.
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.