PrestigeMode

Prestige Mode and Icon’s in Call of Duty: Modern Warfare 2

 Prestige Mode 1

Unlocks: Extra Custom Class Slot (6 Total), “Prestige” tier of Challenges, New Emblem, New Title

 Prestige Mode 2

Unlocks: New Emblem, New Title

 Prestige Mode 3

Unlocks: Extra Custom Class Slot (7 Total), New Emblem, New Title

 Prestige Mode 4

Unlocks: New Emblem, New Title

 Prestige Mode 5

Unlocks: Extra Custom Class Slot (8 Total), New Emblem, New Title

 Prestige Mode 6

Unlocks: New Emblem, New Title

 Prestige Mode 7

Unlocks: Extra Custom Class Slot (9 Total), New Emblem, New Title

  Prestige Mode 8

Unlocks: New Emblem, New Title

  Prestige Mode 9

Unlocks: Extra Custom Class Slot (10 Total), New Emblem, New Title

  Prestige Mode 10

Unlocks: New Emblem, New Title

Process

Prestige Mode for Call of Duty: Modern Warfare 2 you will have to reach level 70 and that you will be awarded with something yet unknown for higher prestige levels. Prestige level players get access to additional create-a-class slots while giving access to new challenges and new titles/emblems specific to their prestige level.

Pros

Once you enters Prestige Mode for the first time in Modern Warfare 2, they will be rewarded with a sixth custom class slot. Apparently, the same occurs every odd prestige level, so presumably a total of five additional custom class slots can be unlocked by Prestige Level 9. In addition, the in-game Intel hint system states that any earned titles and emblems obtained before entering Prestige Mode are not lost.

Cons

If you enters Prestige Mode in Modern Warfare 2, all unlocked weapons, perks and challenges will be reset. The challenges unlocked through Prestige for each gun, however, persist to the next Prestige level (the kills and headshots for each gun’s Mastery and Veteran challenges do not reset). This exception also applies to the challenges in the Prestige category that deal with killstreaks (getting a certain number of kills with a specific killstreak reward). Titles, emblems, and accolades are also unaffected.