On linux.
Unzipping via gui (engrampa) fails with some errors of type: "ERROR: Can not open output file : Invalid argument : /path/to/folder/AvoidFriendlyFire\About\Version.xml"
Unzipping via command line "unzip" package works but gives:
"warning: AvoidFriendlyFire.0.19.2.0.zip appears to use backslashes as path separators"
So maybe backslashes as path separators should be avoided for file names?