Defeat the Major Elemental

Defeat the Golems in Rag'narok level of difficulty with Knokka, Denzil, Frinz and Leck Lorus

Defeat the first Lord of Pain in Rag'narok level of difficulty without ever pausing the game during the combat

Start a new game in Rag'narok level of difficulty; then reach and kill Baron Mornstar without ever pausing the game. Make sure you disable the tutorial and the automatic pause options.

Solve the mystery of the statues at the beginning of Act 3