Call of Duty: Modern Warfare II achievements

Kill the enemy in the porta-potty.

Reach the barge without being seen in 'Wetwork'.

Shoot three enemies while underwater in 'Wetwork'.

Kill three Enemies with the Riot Shield in the Campaign or in Co-op.

Never trigger the alarm in 'Recon by Fire'.

Finish the Campaign on any difficulty.

Collect all the Trophies