S.T.A.L.K.E.R Anamoly is free and a great single player fps with a great vibe to it. Doesn’t quite fit your criteria though as I wouldn’t say there is much of a campaign. Very interesting dynamic world and AI system though.
Edit. Highly recommend the GAMMA version. Get installation files @ their discord.
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S.T.A.L.K.E.R Anamoly is free and a great single player fps with a great vibe to it. Doesn’t quite fit your criteria though as I wouldn’t say there is much of a campaign. Very interesting dynamic world and AI system though.
Edit. Highly recommend the GAMMA version. Get installation files @ their discord.
https://discord.gg/stalker-gamma