Harvest your first soul.
Complete a 5-kill combo.
Trigger Monarch Monkey's cutscene in Act 5.
Resurrect the Werewolf, Dinosaur, Vampire and Pharaoh in Act 3.
Trigger the Alien Robot event in the Slaughter
Kill 50 Thieves in Bonus 2.
Kill the 8 starred characters in Act 7 and trigger the curtain call.
Complete a 10-kill combo.
Clear all Acts.
Achieve the highest rating in all Acts.
Kill all the marked characters.
Spot all the Death Traps in every Act.
Kill the Matron in Act 1.
Successfully launch the missile in Act 2.
Kill all the passengers on the train in Act 4.