Achievements
     Complete  each  of  the  following  achievements below to get the
allotted gamerscore.

Ability First Kill (5)        Perform a kill using your ability 
                              for the first time in challenge mode

Ability Master (10)           Perform 10 frags in a row with only your 
                              abilities in challenge mode

All Rewards Unlocked (30)     Unlock all rewards

ArenaMaster (20)              Perform 5 kills without being killed 
                              in a ranked match

Bishop Campaign 
Completed (20)                Complete all challenges 
                              in the Bishop Campaign

BlackOp Campaign 
Completed (20)                Complete all challenges 
                              in the BlackOp Campaign

Challenges Master (10)        Win Death Match without being killed 
                              in a challenge

First Blood (5)               Try to be the first one that kills an enemy 
                              in challenge mode

Guardian Campaign 
Completed (20)                Complete all challenges 
                              in the Guardian Campaign

Marathon (35)                 Score 1,000,000 points

Slayer (20)                   Get 100 kills in Xbox LIVE ranked match

Tutorials Completed (5)       Complete the tutorial for each character