openrct2

[Bobster]

What do the different Variants mean on their download page for Windows? Windows ARM63, x86, x64, ARM64.

Not sure which one to download.

[Sturmsang]

there are different versions for different system architectures.

if you use windows, you can check your system type in your settings. In windows 10 the path is Settings -> system -> about . there you should be able to see which architecture your PC uses and pick the version accordingly.