Here is the full list of all 32 Millennium 2 - there are Take Me Higher achievements.
Kill 50+ Enemies with Gravitron's Laser
Kill 200+ Enemies with Abu
Complete the game fully (all quests, secret rooms and animal kings)
All quests completed
Kill Gigantine
Kill all animal kings
Kill Lion King
Kill Trickster King
Kill Zombie King
Kill Imp King
Kill Scorpion King
Kill 1+ enemy with Piu-Piu
Complete 8+ quests for Dee
Held more than 30 000 Gold
Finish the game in less than 9 hours in Hard Mode
Hard Mode Completed
All secret rooms found
Kill Ooze King
Repair Gravitron
Pass Gigantine's Lair
Kill Gorilla King
Kill Queen Twin
Kill 50+ enemies with Abu
Spend 20+ hours on the game
Tame 30+ Enemies with Jezabel
Complete 6+ quests
Find 5+ secret rooms
Play 1+ hour
Complete 1 quest
Create Your Government List
50+ items found
Find 1+ secret room