I have been playing Sid Meier's Alpha Centauri since it came out, 20 years ago. I finally got around to playing on the hardest level. I am in the late game, just about the Gravship; it looks like I have a chance to win.

However, the game is now crashing. I would suspect a resource problem, except I have been playing exclusively on huge map of planet since the start, when my PC probably had only a few MB of RAM. My current laptop has 32 GB of RAM, which ought to be enough.

The only time I previously saw this was 5 years ago, when I made a custom sized map which was larger than the huge map. I now stick to huge, and have never once had a problem with the huge map until now.

I booted into safe mode, but terranx.exe won't run. I have tried a fresh boot, then kill a few processes, but with 32GB of RAM for a 1999 game, there shouldn't be a resource problem - unless it is a 32 bit thing.

Any ideas on how I can finish this game?

  • 1
    Do you know how much RAM the game is using when you load your map? For a game made in 1999, it's highly likely to be that 32-bit thing. See if you get near the 2GB limit for 32-bit applications. It could also be a number of other issues, bad asset, etc. That game for me was always somewhat unstable, but I was playing the Mac port.
    – Troyen
    Commented Aug 20, 2019 at 8:20
  • Strange! I loaded the auto-save from one year previously, and task manager shows the game using only 33.1mB
    – Mawg
    Commented Aug 20, 2019 at 8:25
  • Total memory usage 23%
    – Mawg
    Commented Aug 20, 2019 at 8:54

1 Answer 1


There are several possible causes:

  1. Your system may not have all necessary patches, listed here — namely, smacp4e and smacxp103fus;
  2. There are some old builds that cause crashes when an Air interceptor-capable unit is set to Sentry on a friendly base (Shift+L), that base get attacked by an enemy's bomber, and your unit automatically stands up for protection. The symptom is that the crash occurs during the AI move, and you don't really see at what moment it crashes (link, link).
  • Thanks a 1,000,000 for the patches If, for some reason they don't help I guess I will buy it (again) from Steam & hope that they have an updated version
    – Mawg
    Commented Aug 21, 2019 at 12:47
  • It can be bought form Good Old Games. I found the first patch, but not smacxp103fus :-(
    – Mawg
    Commented Aug 21, 2019 at 16:11
  • But GOG has a "keep game up to date" option, so no patching should be necessary
    – Mawg
    Commented Aug 24, 2019 at 7:04

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