The Collection 2 Add-on for Call of Duty: Modern Warfare 3 has 6 achievements.
Complete the "Iron Clad" Special Ops mission on any difficulty.
Complete the "Iron Clad" Special Ops mission on Veteran difficulty.
Complete the "Kill Switch" Special Ops mission on Veteran difficulty.
Complete the "Kill Switch" Special Ops mission on any difficulty.
Finish with your tank at full health in the "Iron Clad" Special Ops mission.
Destroy 6 helicopters in the "Kill Switch" Special Ops mission.