RPCS3 is an experimental PlayStation 3 (PS3) emulator. Currently usable only for small homebrew and a very small number of commercial games, it aims to eventually emulate the PS3 fully.
RPCS3 only works for small homebrew and some commercial games (Arkedo Series - 02 Swap!, Sonic CD, Retro City Rampage) right now, in addition to recently achieving the ability to reach ingame (though glitchy) on other titles (Disgaea 3, Arkedo Series - 03 Pixel!, The Guided Fate Paradox). Any other game will either not work, or if you are lucky, get an intro. Don't expect anything that can play any PS3 games at full speeds for a long time. Even longer if you want good compatibility/few glitches.