RetroArch the a frontend for emulators, game engines and media players. Enabling you to run classic games on a wide range of computers and consoles through its slick graphical interface. Will soon be launching on Steam. Retroarch Steam Launch lineup revealed 10 Cores Available On Launch Day We are deciding to launch with 10 cores at launch. These cores have already been approved and uploaded on Steam. They are as follows: Mupen64 Plus Next Kronos PCSX ReARMed Stella SameBoy mGBA Mesen Mesen S Genesis Plus GX Final Burn Neo Additional cores will be available as DLC. Retroarch Steam page. Further Information and discussion can be found on the GBATEMP Independent gaming community forum thread.