ok, i see so many people now having the same problems But there is no real easy solution for why they do not work. It could be many different things and you will have to narrow down the problem. If you have an actual ISO image and burn it to disc then it should play in your PS2. If you have an MDF & MDS file it is most likely a CD game and needs to be burned to a CD. here are some guides: http://www.xtreme-source.com/tutorials-playstation-2/2025-how-backup-psx-ps2-cd-rom-games.html http://www.xtreme-source.com/tutori...dvd-games-nero-burning-rom-alcohol-120-a.html http://www.xtreme-source.com/tutori...ckup-ps2-dvd-games-dvd-decrypter-imgburn.html if you downloaded it then just start the tutorial where you burn the image and forget about the part where you are making the image from an original disc Here are possible causes as to why your games will not work. 1. You are using low quality DVD's. I can not stress enough how important it is to use high quality DVD's and CD to do games on. 2. your burners firmware may be out of date and need to be updated this will help with burn quality and media compatibility 3. you are not burning at a correct speed. If you use 4X as your burning speed it will generally work on 8X and 16X speed DVD's. If you are using 4X speed DVD's then burn them at 1X, but really i think 4X speed DVD's are too slow and i do not really care for 16X either so i suggest a good 8X speed DVD. I like DVD Decrypter the best for burning ISO files, a second choice for me would be IMGburn, which is the same program except that it can not read a game and make and ISO, it can only write the ISO to a blank DVD.