Here is the full list of all 33 Young Souls achievements.
Collect 100,000 gold
Collect 50,000 gold
Kill Shinjo
Kill Kah-Kon
Rescue the Professor
Help the Professor to bury the Digger under rocks
Defeat Dwarvengobben
Beat Yarlanda in the last Mausoleum
Finish the game at least in Challenging mode
Complete the game at 100%
Kill Dinkoy
Complete a dungeon without taking any damage
Clear all Catacombs
Clear all hard branches
Open all gold key chests
Open all silver key chests
Kill Fazmore
Collect 25,000 gold
Ride a dragon for the first time
Upgrade a weapon to 6 stars
Earn 5 stars on a Happy Fit training session
Open all bronze key chests
Upgrade an accessory to its maximum level
Kill Tetcha
Kill Marl
Equip an armor and helmet combo
Upgrade a weapon or armor
Dodge an attack by rolling
Beat Dinkoy
Block 10 attacks
Parry an attack
Kill a goblin for the first time
Finish the game in Expert mode