•AK-47 - Complete all Assault Rifle challenges
•Desert Eagle - Attain Level 55
•Dragonuv - Complete all Sniper Rifle challenges
•M1014 - Complete all Shotgun challenges
•M60 - Complete all LMG challenges
•Mini-Uzi - Complete all SMG challenges
•Assault Rifle (G3) - Rank 25
•Assault Rifle (G36C) - Rank 37
•Assault Rifle (M14) - Rank 46
•Assault Rifle (M4) - Rank 10
•Assault Rifle (MP44) - Rank 52
•LMG (M60E4) - Rank 19
•Pistol (Desert Eagle) - Rank 43
•Pistol (Golden Desert Eagle) - Rank 55
•Pistol (M1911) - Rank 16
•Shotgun (M1014) - Rank 31
•SMG (AK-74U) - Rank 28
•SMG (Mini Uzi) - Rank 13
•SMG (P90) - Rank 40
•Sniper Rifle (Barret) - Rank 49
•Sniper Rifle (Dragunov) - Rank 22
•Sniper Rifle (M40) - Rank 04
•Sniper Rifle (R700) - Rank 34
•2 - "CoD Noir" Play the game in black and white.
•4 - "Photo-Negative" Game colors become inverted.
•6 - "Super Contrast" Game's contrast increases.
•8 - "Ragtime Warfare" The game feels like an old silent movie.
•10 - "Cluster Bombs" One frag grenade thrown equals five in explosion.
•15 - "A Bad Year" Enemies explode into tires when shot.
•20 - "Slow-Mo Ability" Game plays at 40% normal speed.
•30 - "Infinite Ammo" Just what it says.
•Level 2 - 2
•Level 4 - 2
•Level 5 - 3
•Level 6 - 2
•Level 7 - 2
•Level 9 - 3
•Level 10 - 2
•Level 12 - 2
•Level 13 - 3
•Level 14 - 2
•Level 16 - 2
•Level 17 - 1
•Level 18 - 2
•Level 19 - 2