Here is the full list of all 43 Millennium 4 - there are Beyond Sunset achievements.
Register Old Suzuki (just in time!)
Convince the Bear to join
Pass the Crystals trial
Kill 15+ groups of Tianas during the second trial
Defeat the Tyranosaurus
99+ hits with Bokden's Hands
Find 5+ secret rooms
Go through the Grand Rift
Recruit Bokden
Complete 6+ quests
Kill the King
Get 50+ Gold from a gold sack
Recruit Wolfgang
Play 1+ hour
Complete 1 quest
Kill Golem Overking
3+ hits with James' Hands
Find 1 secret room
400+ hits with Marine's hands
Reach lvl 6 in Bare Hands with Benoit
150+ items found
20+ secret rooms found
All secret rooms found
Complete the game fully (all quests, secret rooms and animal kings)
Kill all animal kings
Hard Mode Completed
Held more than 99,000 Gold
All quests completed
Finish the game in less than 13 hours in Hard Mode
Spend 40+ hours on the game
1000+ fights
Kill Gorilla Lord
Kill Legendary Warrior
Kill Kingdom of Weapons
Kill Soil of War
Kill Shooking
Kill Urchin Nation
Kill Perfect Chopper
600+ hits with Salome's Hands
Kill more than 1000 enemies with Bokden
Complete Q9 (Find Jacque's Hair Potion)
Find 40+ XP baskets
Kill 1000+ enemies with The Bear