Complete each achievement to get the allotted gamerscore. The number between the () is the gamescore for each achievement.
Barbaric Recruiter (20) - Host an online match using the Iceberg or Village level
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
Honorary Barbarian (15) - Complete Mission Mode playing as Ivar or Gullarp
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