Good guess, but apparently the encryption sticks regardless of whether I tone down the English on my speech.
If motivation is need I can provide a batch of fresh warm cookies to the person who decodes these files. They'll most likely be in jpeg format if you're not allergic.
;) Have the game image here, will take a look later. But as far I can see... I've never seen anything like that, and I've been around for quite some time now. :-\ Could this be a case for HCS?