Yes. It is possible, if you either have a softmod or a modchip installed in there

You may need to recognize what region is your ps1 to play your developer game, if not then you can use a pal color fixer just like i did to play Earthworm Jim 2 [PAL] on a NTSC-J console

For days, ive been wondering if you could play Doko Demo/Koneko Mo Issyo on the PSone with a modchip and without pocketstation. So i was wondering if you could play it without a pocketstation, and i came here If anyone knows thanks for helping me :praise PD: Is a windows vista machine good for burni...