Saving Los Angeles
Enter the Race Editor, create a race, and then save it.
1/5/2012
10:18:10 PM
Very Rare 6.8%
Father Time
Completely unlock a time trial by completing all 3 missions.
12/23/2011
10:36:33 PM
Rare 15.0%
Smoke that Skinwagon
Make it to wave 15 in Undead Overrun Gametype in Multiplayer.
9/3/2011
2:58:00 AM
Ultra Rare 2.4%
In a Hail of Bullets
Kill 500 enemies with any pistol or revolver in any game mode.
9/3/2011
12:55:43 AM
Rare 10.3%
Most Wanted
Become a Public Enemy for 10 minutes and escape alive in a public Free Roam session.
9/2/2011
11:38:02 PM
Ultra Rare 2.2%