The Vietnam Add-on for Battlefield: Bad Company 2 has 10 achievements worth 250 gamerscore.
Get gold stars on all primary Vietnam weapons
Get silver stars on all primary Vietnam weapons
Get 50 kills with the Huey
Win a round of either Rush or Conquest on all four Vietnam levels
Get 100 kills with Vietnam tanks
Get a kill with all Vietnam vehicles
Achieve the best squad award on Operation Hastings
Finish first on the scoreboard on any Vietnam level
Get 20 kills with the flamethrower
Destroy a Hannoi Hannah propaganda speaker