Get a Dementia Skull or higher on every mob within World 3 in the Deathnote feature. I probably don't have to specify "or higher" here lol
Defeat 2000 Crystal Monsters to become the Heavyweight Champion of IdleOn!
Collect 120 unique cards. This basically makes you like, THE guy who does the card stuff!
Complete 150 Quests on a single character. The name speaks for itself.