Old Faithful
Kill 400 enemies with assault rifles, submachine guns or shotguns
2/28/2010
3:51:03 PM
Rare 43.1%
In Synch
Kill two enemies with simultaneous quick draws while in co-op mock surrender
2/28/2010
2:27:29 PM
Very Rare 5.3%
Not So Bad After All
Tie up 15 enemy combatants instead of executing them
2/28/2010
1:20:55 PM
Rare 16.6%
Rock, Paper, Scissors
Beat your partner at rock, paper, scissors 3 times in a row
2/27/2010
7:44:44 PM
Very Rare 5.8%