The stand-alone mod S.T.A.L.K.E.R. Anomaly aims to be the most stable and customizable experience for fans of the S.T.A.L.K.E.R. games. It's powered by the Monolith 64-bit engine, a custom fork of the X-Ray engine.
This modification will add military presence to secure the staircase under military base, as well tweak the spawn to make the location more challenging. The lore of the mutant-infested hellhole of Agroprom Underground persists.