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scient-unofficial-smacx-patch
Scient's Unofficial Patch for Sid Meier's Alpha Centauri and Sid Meier's Alien Crossfire
There's a number of active communities about still playing the game, including /r/alphacentauri on reddit, a discord server at https://discord.gg/7BkcvXUX , and https://alphacentauri2.info/index.php?action=community
I know the last time I picked it up, there were a well respected set of patches from scient (a quick google pointed me to https://github.com/DrazharLn/scient-unofficial-smacx-patch ). Somewhere in here is a pre-done distribution you can just click and run with for modern windows.
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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glsmac
Unofficial open-source OpenGL/SDL2 reimplementation of Sid Meier's Alpha Centauri ( + Alien Crossfire )
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fcw.org-server
The current state of the https://www.freecivweb.com server is the last commit in the /dev branch which pre-dates the timestamp of the latest rebuild announcement publicised in the FCW Discord announcements channel.
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This project improves the AI, but might not be quite what you want?
https://github.com/induktio/thinker