EA has confirmed that is hopes to fix the Army of Two: The 40th Day DLC problems “soon”. The Chapters of Deceit add-on currently has faulty Achievements and Trophies.
”There is a known issue affecting Achievements in an Army of Two DLC pack. We are looking into a solution and hope to provide an update soon,” said an EA spokesperson.
The DLC is 800 Microsoft Points on Xbox Live, and £6.30/€7.99 over the PSN.