O tym DLC

The DLC will unlock the “military research room” in the new prison building. The building will obtain research points by reading all designers and mysterious drawings, thus developing a series of modern military weapons and equipment.
In addition to unlocking buildings, the DLC will also unlock 5 new weapons, 3 new helmets, 1 mask, 3 new body armor and 1 combat glasses.
They are: SVDM Silent Sniper Rifle, AK15 Assault Rifle, PL-15 Silent Pistol, Spotted Viper Armor Pistol, Skull Charge Pistol, M88 Ballistic Helmet, Fast Tactical Helmet, Alkin Helmet, Gladiator Mask, Diamond Armored Vest , MASS combat vests, black water body armor and MASS combat goggles.

(The building can be built in both storyline and Empire modes. The DLC can be installed independently of the Apocalypse project.)