

Its effect is unlimited sprint and climb obstacles faster. Marathon Pro: Run 26 Miles while using the Marathon perk. Its effect is move faster and quick aim after sprinting. Lightweight Pro: Run 30 Miles while using the Lightweight perk. frag grenades and throwing knives) while in Last Stand mode. Its effect is that you can use your equipment (i.e. Last Stand Pro: Get 20 kills while using the Last Stand perk. Its effect is that Killstreak rewards require one less kill and Deathstreak rewards require one less death. Hardline Pro: Get 40 Killstreaks while using the Hardline perk. Its effect is increased explosive weapon damage and extra air support damage. Danger Close Pro: Get 100 kills with explosives while using the Danger Close perk. Its effect is increased melee distance and no falling damage. Commando Pro: Get 20 melee kills while using the Commando perk. Its effect is undetectable by UAV, air support, sentries, and thermal imaging and no red crosshair or name when you are targeted. Cold-Blooded Pro: Destroy 40 enemy Killstreak rewards while using the Cold-Blooded perk. Its effect is two primary weapon attachments and two secondary weapon attachments. Successfully complete the indicated task to unlock the corresponding Professional perk:īling Pro: Get 200 kills while using a weapon with two attachments. Sixth Custom Class slot: First Prestige Seventh Custom Class slot: Third Prestige Eighth Custom Class slot: Fifth Prestige Ninth Custom Class slot: Seventh Prestige Tenth Custom Class slot: Tenth Prestige Reach the indicated Prestige level to unlock the corresponding Custom Class slot. Reach Level 70 in Multiplayer mode to unlock Prestige mode. Do not bother shooting anyone prior to using the bell, as it will not count.

Note: There are three rooms, one of which nothing happens in. There are two waves of kills needed to complete it. You will hear a sound once that wave is completed. About thirty people (all characters from the game) will try to kill you. Once you press this button, enemies will begin coming to life in one room area at a time.

On the desks there is a red bell that is labeled "Don't Press". Go to the desks by the entrance to the rooms.

Get two weapons, and max out your ammunition through the crates supplied. When the level begins, it is recommended you first study the layout. Go to the single player missions, select the new "Museum" mission at the bottom, and choose a difficulty. Successfully complete the game to unlock the Museum bonus level.
