Well, I just solved this problem on my Windows 7 computer, so... Here you go!
If you are getting an error 11FD about a file data being invalid OR if the game closes on you when you click "Start Game" in the launcher, there IS an easy solution for Windows 7
- Download this (It's a compressed folder of the game files)
- Once it's done downloading, replace ALL the files in the "FreeStyle Gunz" on your HARD DRIVE with the ones in the .rar you just downloaded
- Try to launch again. If it works yay!
- If it doesn't work then open up the "Freestyle GunZ [FreestylersWorld] Installer" installer that you FIRST downloaded from the forum
- When it asks you for the location to install it at, select the folder with the files downloaded from the link above
- Once all that is done, right click on "GunzLauncher", go to "Properties", Tick the Capatability box and change it to "Windows XP Service Pack 2"
- Tick the "Runs as Admin" box
- Click "APPLY", then "OK"
- Now, launch the game
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Sorry about the sloppyness. I will fix it up later, include screen shots if needed, or a video.
IF IT STILL DOESN'T WORK, PLEASE TELL ME!
Thanks to [A]llergy for the compressed file.
=]
+Rep if it helped?