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As of September 2023, (the steps outlined by @zoward) essentially still work on Ubuntu 23:

1. Download the latest `libssl1.0.0` package from
At the time of writing, the latest package is `libssl1.0.0_1.0.2n-1ubuntu5.13_amd64.deb`
2. Install the package via `apt` or with the GUI
3. Launch the game

I did not have to reload the libraries, but if you encounter problems, consider rebooting.
Post edited September 10, 2023 by Prodeguerriero