These achievements can only be unlocked via the (free) Veteran Map Pack downloadable content. These achievements cannot be achieved without this content. This content is worth a total of 150 Gamerscore.

Achievement	How to unlock it
Arnold Braunschweiger ( 20 points )	Destroy 300 destructible objects in Mission 7,8
I promise to kill you last ( 30 points )	Kill Dalton in less than 40 seconds
I wanna be a cleaner ( 25 points )	Final blow to Dalton is a headshot with a pimped .44 MODEL 29 handgun
Mission 7 Complete ( 30 points )	Complete Mission 7 as Professional
Mission 8 Complete ( 30 points )	Complete Mission 8 as Professional
That's right. Who's laughing now ( 15 points )	Buy the 'pack 8' gun pack in a multiplayer ranked match

Please note this content and it's achievements are not currently available in Europe.