Def Jam Rapstar

For this, you must complete all of the Multiplier challenges in the career. Multiplier challenges require simply obtaining a 4x multiplier and keeping it for a series of sections. 5 Mic scores are not required, but you WILL need to earn 5 Mics if going for the "Microphone Fiend!" achievement. There are 3 Multiplier Challenges in the game. The first is Ludacris' "Stand Up" in Stage 2, the second is T.I.'s "Live Your Life" in Stage 3, and the last is Nelly's "Hot In Herre" in Stage 5. Complete all three, and the achievement unlocks at the summary screen of the final one completed.