So, I just came from playing Super Magnetic Neo for the first time. Pretty good game so far, I like the attraction/repulsion gimmick that is implemented. It helps the game stand for its own and not just become a Crash Bandicoot ripoff. The strangest thing that happened though was when I finished playing; I booted back to the Dreamcast menu, and my VMU's icon had been changed from a happy face to the Crave logo. I checked to see if there was an extra file saved on my VMU along with my save in the menu; nothing. I even deleted the save, and still nothing.
So then I booted up the handy-dandy Dream Explorer and found a 3 block icon data file for the Crave logo that was hidden from the default file menu. If you didn't catch onto that, Super Magnetic Neo basically installed a virus onto my VMU (not in the way that it harms files, but makes changes to the settings without telling the player). I didn't even know that was possible, let alone that developers would be sneaky enough to put them in.
I was incredibly confused, and eventually found out that other games do this as well, like Shadowman. None of my other Crave games do this though.
Could I get some more info on this, as well as more games that do things like this? Thanks.