S.T.A.L.K.E.R.
(Scavengers, Trespassers, Adventurers, Loners, Killers, Explorers and Robbers) is a post-apocalyptic first-person shooter that takes place in the Chernobyl Exclusion Zone, a radioactive area in Ukraine.
G.A.M.M.A is a large community driven project combining the work of many modders, and each and everyone one of them are contributing to making S.T.A.L.K.E.R Anomaly a better experience.Build Upon S.T.A.L.K.E.R.
Anomaly, a standalone mod that combines the maps and some cut maps from the original trilogy itself with new mechanics and features.
It does not come with the storylines of the base 3 games.
It comes with its own plot.