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I remember, e.g., the "Transportation Pack" as a free DLC. But there were many others (I saved *all* of them in my external HDD and optical discs, but they were intended only for the original software — which I fully [Standard + Rush hour] bought for Windows XP).
TIA.

Edited to add: maybe a more precise title was "addon" rather than "update", about these little packs.
Post edited January 30, 2021 by andy-drew
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Elsewhere, I found that these are just .dat files to add, so they should work with every OS. Enjoy the game.