Complete the following challenges to unlock the corresponding bonuses. Challenges can be completed in Matchmaking, and Custom matches. View your progress in the "Statistics" menu:CHALLENGE - BONUS
10 Kills - All weapons
10 Wins - All game type
100 XP - All backpacks
100 XP - Every weapon
1000 Kills - 1 weapon
5000 XP - 1 backpack
5000 XP - 1 weapon
500 XP - 1 bonus XP event
5 XP - All bonus XP event
1 Life: 10 Kills - 1 weapon
1 Life: 5 XP - 5 backpacks
1 Life: Kill - 5 weapons
1 Life: 15 bonuses