Kill 500 Monsters while in Nephalem Rifts.

CQC Slam a guard and knock him out

Eat a snake of any type

Achieve a camouflage index of +90%

Perform a Standing Tackle and keep possession of the ball 10 times

Conquer Stage 2.

You got your first rank S. (Any mode)

You completed your first challenge.

You did some training.

Complete all quests in Act V.

Pick up 500,000 gold.

Kill 500 elite (champion, rare, or unique) enemies.