If you are into retro gaming The 8-Bit Guy goes over some of your best options. He gives some valid reasons that make MS-DOS gaming the best option if you are looking to get into playing some retro games. Nice thing is the old laptops that are needed are old clunkers that are not useful for anything modern making them super cheap. You might need to look around for a while for the optimal system though based on some of the criteria that the 8 bit guy goes over.