To unlock the following Extra Modes DLC Trophies, complete the following tasks.

Trophy	How to unlock
3-Balls and out! (Bronze)	Win a 3-ball online match (Requires Extra Modes Pack).
Always bet on Black (Silver)	Win 100 black-ball online matches (Requires Extra Modes Pack).
Career Conqueror (Gold)	Complete the career mode (Requires Extra Modes Pack).
Odds are 14 To 1 (Bronze)	Win a 14 to 1 online match (Requires Extra Modes Pack).
Serial Killer (Silver)	Win 100 killer online matches (Requires Extra Modes Pack).
Slice N Dice (Bronze)	Win a cut-throat online match (Requires Extra Modes Pack).