There are several games on PC that can damage your computer, there's also a homebrew cart that people make for the NES that all it does is destroy the console.
There is also a Japanese Dreamcast game that has a computer virus on it if your stupid enough to put it in your computer.
Good to know about this demo disc if I come across it.
This is good advice, yes some old PC games will actually read as malware on a newer windows OS, but at the same time I did not have any anti-virus software growing up in the 1990, (and my PC ran just fine) yet when I connected to the Internet on a more modern Windows Operating System, (Windows XP and later) some of the newer malware programs will block older PC games
even though my computer worked just fine without anti-virus in the 1990's as long as it was not connected to the internet
later on in the year 2000's with an offline Windows XP I however did get malware, that used to somehow corrupt any CD-ROM disc left inside the computer for a long amount of time for some reason
Demo arrived. First PS2 wouldnt read it. Second PS2 did. Successfully formatted memory card with corrupted data
So it DOES work! Oh that's good to know- I always thought that disc could be a valuable tool for collectors/retro stores that might need to fix a corrupt card!
Makes me wonder if the memory card format would work on a virtual PS2 memory card using a 60GB PS3.
(edit) You should be able to just delete your virtual memory card off your PlayStation 's harddrive if it's corrupted on a PlayStation 3 no problem, I think you are safer playing PS2 game on a fully backwards compatible PlayStation 3 then on a PS2 for this reason.