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