Achievements
Do the following tasks to unlock the following achievements and their alloted gamerscore:
Challenge x15 (10) - Defeat 15 opponents in Challenge Mode
Challenge x50 (20) - Defeat 50 opponents in Challenge Mode
Combo x2 (15) - Kill 2 opponents in rapid succession
Combo x5 (20) - Kill 5 opponents in rapid succession
Complete Mission Mode (20) - Awarded for completing Mission Mode
Completed Training (10) - Complete the Single Player training mode with any character
Marksmanship (25) - Score over 10,000 in the 'Shooting Range'
Played 100 Matches (25) - Play 100 matches either offline or on Xbox LIVE
Six Degrees of Small Arms (0) - Play online to 'catch' this elusive Achievement
Won 10 Matches (10) - Win 10 matches in Single Player or by playing on Xbox Live
Won 100 Matches (25) - Win 100 matches in Mission Mode or Battle Mode
Won 50 Matches (15) - Win 50 matches in Single Player or by playing on Xbox Live
Unlock Characters
ISO-7982 - Complete mission mode
Billy Ray Logg - Beat him in mission mode with any character
Mousey McNuts - Beat him in mission mode with any character
Professor Von Brown - Beat him in mission mode with any character
Shooting Range
Beat Mission Mode.