I think it's some kind of cleaner upper code used to fix some of our errors in the sims 2, however you cannot find any information on it in the internet now, but I don't believe it is some kind of spyware or anything, The sims one once told us Sim in Background option is suppose to enable sims to go about there lives while the game was minimalized but I never found that information to be true. The sims 3 has something that even said it sends data to EA about the game, I was even paranoid back in the day and used to play The Sims 3 with it forced to be off.
But I come to the conclusion of how stupid my thinking was to actually think EA or maxis would give a shit about how I played my game and want to spy on me, even a black hat hacker/stalker would have something more interesting to do with their lives than monitor everything I do and done in a sims game.
I've seen some strange things in the sims 2, like for example chairs that I myself once mistakenly misplaced the wrong way get automatically corrected, it was almost as if something in The Sims 2 background was giving me a helping hand with my sim world and sometimes fixing simple routing and even fixing objects that were once facing the wrong way
I think there is some kind of hidden code installed in the sims 2 at least that helps us from time to time, but I also think that by using the debug mode it somehow disables this hidden code and I believe the the testing cheats is only for modders and developers to use because my game works fine without ever turning on the debug mode, therefore I just allow my game to auto correct errors.
For those who do not know software developers have been putting auto correcting code in programs for a long time now windows chkdisc is one of those examples for windows OS's and now by default that program will auto fix any errors it knows how to fix, without asking you to fix it constantly unlike that older Windows OS's options used to be, but from what I gather you can still tell your computer only to fix certain errors through command prompt settings.
It is just an option that disables auto-pause when the sims window is minimised. That's what it means by "Allow sims to go about their lives when the game is minimised".
It seems to work as designed in my game, I've just tested it. If it's set to "off" and I minimise the game and wait 30 seconds, no time has passed in-game when I re-maximise it. If I set it to "on" and I minimise the game and wait 30 seconds, several in-game minutes have gone by.
I've never noticed things like chairs auto rotating, but I don't think that is related to this option and I don't really know what you mean about the debug mode - that is made for developers/modders, indeed, and you should not ever need to use it.
There was apparently code in TS1 that would report back - it's talked about in that TS2 developer twitter thread. But it was just coded into houses, it didn't constantly spy on you. You could just look at the data from a downloaded house, if you knew what to look for, and find out what people had been doing in that house. If that exists in TS2, it would disappear if you use the processes/tools provided by the TS2 modding community to clean a lot for upload, and even if that somehow didn't clean it, nobody is looking at TS2 any more anyway, it's abandonware.
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