Call of Duty: Modern Warfare 2 Challenges

Call of Duty: Modern Warfare 2 has many challenges to help players rank up. There are 14 different Categories.

Handguns

 * The Desert Eagle, and the .44 Magnum can only equip the FMJ, Akimbo, and Tactical Knife attachments.

Operations - Section unlocked at Level 10
Asterisk (*) = Challenge unlocked at Level 11

Killstreak - Section unlocked at Level 16
Asterisk (*) = Challenge unlocked at Level 21

Precision - Section unlocked at Level 26
Asterisk (*) = Challenge unlocked at Level 31

Finishing Moves - Section unlocked at Level 35
Asterisk (*) = Challenge unlocked at Level 37

Humiliation - Section unlocked at Level 41
Asterisk (*) = Challenge unlocked at Level 43

Elite - Section unlocked at Level 53
Asterisk (*) = Challenge unlocked at Level 57

Intimidation - Section unlocked at Level 61
Asterisk (*) = Challenge unlocked at Level 64

Prestige
These challenges are unlocked after Prestiging once. All of the challenges related to killstreaks carry over into the next levels of prestige, whereas the Heads Up! and the last five challenges (Knife Veteran, Last Stand Veteran, Stealth, Stun Veteran, and Flashbang Veteran) reset after each prestige.

Hidden/Other
These challenges cannot be found in the barracks, but can be completed by playing through multiplayer. These challenges seem to unlock after certain levels, but it is unknown which levels (EG: Radiation Sickness will not unlock until after level 10). Italics mean unconfirmed names, xp or description. Currently, all of these challenges reset when Prestiging.