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