Requires Anomaly (default edition) first. Grok's curated hardcore survival overhaul — install from the official Grokitach/Stalker_GAMMA GitHub guide.
FPS / Survival · 2018
That One Thing
The whole trilogy's map set opens as one free-roaming survival sandbox with faction starts you choose.
G.A.M.M.A. (Grok's Automated Modular Modpack for Anomaly) is a hardcore, curated survival overhaul built on Anomaly — crafting, economy, ballistics, AI, and graphics reshaped into one balanced package via Mod Organizer 2 and the G.A.M.M.A. launcher.
Install order: (1) install PlayBound's Anomaly — Standalone (Default) edition and launch once to the main menu; (2) follow Installing-GAMMA on the official GitHub repo https://github.com/Grokitach/Stalker_GAMMA (wiki + G.A.M.M.A. launcher). Do not overwrite a GOG trilogy folder. Expect a large download and a long first install. Optional alternate: GOG one-click GAMMA if you prefer that storefront.
G.A.M.M.A. - Grok's Automated Modular Modpack for Anomaly - is a curated hardcore survival overhaul with crafting, economy and balance changes layered over Anomaly.
A single install for the hardest version of the Zone.
Best for
Not for
Checking…
Minimum Requirements
Working Anomaly 1.5.x · Windows 10 · Quad-core · 8 GB RAM · DX11 GPU · ~80 GB free for downloads
Recommended Requirements
Windows 10/11 · 16 GB RAM · modern DX11 GPU · 130 GB+ free storage · SSD strongly preferred
Installed and played end to end by the PlayBound team.
Installed and played end to end by the PlayBound team.
Free standalone — no trilogy GOG install required. The whole Zone as a free-roaming survival sandbox.
Looking for the base game?
S.T.A.L.K.E.R. Anomaly has an overview, reviews, guides, and discussions covering every edition.