halo 3 acheivements?

[pokemon massta]

how to beat the "were in for some chop", "marathon man" and "used car sales man" acheivements on halo 3

 

[Sick Girl]

Marathon Man:
Locate and access all Terminals in the Campaign: these are spread over the campaign, go inside them & activate them. Guide: http://www.halo3planet.com/halo-3-skull-locations/

Used Car Salesman:
Destroy a vehicle that has three enemies in it in a ranked playlist or in campaign. You should try this with the rocket launcher, a grenade or the laser.

We’re in for some Chop:
Destroy an enemy vehicle with equipment in a ranked playlist or in campaign. Basically you have to destroy a vehicle with one of the specials, for exemple: the trip mine.