Indeed you can install and play those games on any given machine these days Like, you can launch street fighter 2 on a pc with the default mame interface... And play it with the keyboard, you can do that Now I don't do that because it's totally pointless; you can barely play like that, it's more for testing purpose than anything else Indeed, hardware is important, in fact you have games that are bordering on totally pointless without the original hardware or at least a suited hardware, games such as duck hunt or marble madness for instance. Playing duck hunt without lightguns is just... What it is I guess So yeah you can install and play those on a phone, with some shit like that https://pic8.co/sh/VfaGtO.jpg And then the neogeo snk original hardware is this https://pic8.co/sh/sWTMBQ.jpeg I'm not saying there's a total incompatibility... But the button layout and the hand position aren't the same, like not at all, many games will feel awkward, same deal with most arcade games such as mortal kombat or street fighter 2, sure you can play those with a snes button layout, but even back then it felt akward to have strong kicks and punches on shoulder buttons... And then somebody calls on your phone or android update while you play... Side effect of playing on a phone, on top of that adding or removing games on a phone is a pain in the ass because it's a phone, and phone batteries tend to last as long as snow in the sun on top of that I'm not saying hardware is everything, but in many instances it's almost everything A bad joystick is enough to ruin a game, if anything that's what I'm saying, comfort is a thing That being said, most of those games are made to be played on 4:3 screen, not a 16:9, the stretch effect isn't that a big deal for some, and for others it's just plain wrong Edit: So far, from all the machines I've reviewed the GPI case is the better deal to me (mostly because it's raspi zero based therefore fully customizable, it's potentially a full blown computer, not just a toy) https://pic8.co/sh/9aG1N9.jpeg < raspi zero in the cartridge slot That being said... I prefer the "mini bar top" formula, for the overall casing and input interface https://pic8.co/sh/IVC50u.jpeg it's not like I'm going to carry around a gameboy in my pocket anyway, I can't stand the phone to begin with That, is typically sitting next to the computer on the table, to play games but not only, playing multimedia files/movies eventually, doing torrent box, mostly "read only stuffs" so a keyboard for inputs isn't that necessary, a joystick with the right settings and right OS can do. And again not just a toy, there's a "real computer" inside and I have 100% control over it, I'm not a fan of the retropie interface I prefer my own stuff. In the end that's what it's all about tbh, building my own stuff Ultimately this casing is a pretty good idea, conceptually speaking, regarding the overall size/ergonomy, it's smaller than the above, but not too small https://pic8.co/sh/KNEyhR.jpeg https://pic8.co/sh/r9hspv.jpg Problem is that buttons and joystick (and the overall shit) is too cheap, I don't like buttons that do "clack!" I like rubber silence... And I don't like loosy joysticks https://youtu.be/KRqfxshC_MI?t=228 ... It's a chinese knockoff of the starforce neo ultimately https://youtu.be/KWIQfs6IdbQ?t=128