Army of Two: The 40th Day — Weapons and upgrades are available, with upgrades interchangeable between weapons, such as adding the barrel of one assault rifle to another. The Upgrade option returns along with new camouflage schemes. Weapons can now also be obtained from dead enemies, increasing the player's arsenal to four weapons along with grenades. The bullets will be able to penetrate weaker materials such as wood and sheet metal. Certain weapons and weapon lockers can only be unlocked through Morale Moments. Weapon parts can be obtained for free in the game, either by searching armored crates (which are locked once the enemy guarding them detects the player's presence), rescuing hostages, or simply exploring.