S.T.A.L.K.E.R. G.A.M.M.A. is a massive, free-to-play mod inspired by the S.T.A.L.K.E.R role-playing franchise. It is an improvement from the Anomaly Mod, adding new features, content, and gameplay options for players to enjoy. This mod pack rebalances gameplay mechanics concerning scavenging, cooking, crafting, and repairing, providing a more complete experience apart from the main campaign. It also introduces minor changes to the missions, offering a longer progression with increased spawns and better animation frames. The user interface and weapon loadouts have been changed, creating a more foreboding feel. However, it requires the latest version of the Anomaly Mod and must be deployed in its entirety.
While the community behind the Anomaly mod continues to improve the standalone game, S.T.A.L.K.E.R. G.A.M.M.A. is already a major add-on and a definite must-have for this. It rebalances the survival experience, making it more challenging than the original. Though it lacks customization options, it is highly recommended for players looking for a new and improved S.T.A.L.K.E.R. experience.