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Is it really necessary to run the game with superuser priveleges? (i.e. sudo)

To be honest I haven't tested the latest versions of the game on Linux :/

if you see no problems when running as a normal user, then it shouldn't be necessary. 

Or perhaps you are asking because you have no su privileges on your account? If so, I can test it and let you know. 

I tried running it as a normal user and it works fine. There are no errors and the performance are similar on both cases.

I (and most Linux users) don't want running executables as the root user because (1) it can possibly be a security threat from the program itself or an undiscovered exploit, (2) it requires typing the user's password and kinda annoying for just running a game, and (3) if a user doesn't have `gksudo` installed (i.e. like Windows' UAC prompt) , they need to pull up a terminal which is annoying above that you also need to do #2. And it's much easier to just double-click the executable file than on a terminal

Great game indeed! Even Linux to Windows multiplayer works!

Thanks a lot for testing and letting me know!

Not preferring to use sudo is completely understandable. I mentioned using it to be sure it works fine, but truth is I should test the requirement when releasing a version. It's just that it takes time :(

Also good to know cross-platform networking works. I used low-level networking so I would expect it to, but haven't really tested it.