Gutsy Call
Take an Online Head to Head Ranked match to extra time playing as a weaker team than your opponent
10/10/2009
10:53:18 PM
Rare 11.5%
Experimental
Play 5 consecutive Online Head to Head Ranked matches using a different team
10/9/2009
8:13:44 PM
Rare 10.8%
Grind it Out
Win a match with 10 men Online or when playing on Professional difficulty or higher
10/9/2009
7:34:34 PM
Rare 32.2%
Untouchable
Finish any chapter, except for VI and VIII, without getting severely wounded.
9/6/2009
1:16:22 PM
Rare 30.2%
High Noon
Kill 4 enemies between 12:00 p.m. and 12:15 p.m. (local time, ranked play counts).
9/6/2009
10:59:52 AM
Rare 22.8%
Weapon of Minor Destruction
Kill no more than one zombie with a nuke. (Map Pack 2 only)
8/10/2009
1:54:03 PM
Very Rare 7.0%
Ultimate Highlights
Dominate the opponent in all 3 scenes of a replay segment.
7/14/2009
12:55:45 PM
Rare 39.7%
Cut Your Teeth
You were successfully promoted up a rank in multiplayer.
6/18/2009
10:55:13 PM
Rare 18.8%
The Gipson Curse
Go into an online match after choosing your own arena player
6/15/2009
11:39:16 AM
Rare 22.4%
Huge investment
Buy a player in Manager Mode for 50 million of your chosen currency
5/16/2009
1:17:53 AM
Very Rare 9.9%