The most reliable way to play as Kratos on PC is to emulate the original PlayStation 3 version of the game rather than using the native PC port.

On PC, unlocking Kratos in Mortal Kombat 9 is not a “fix” in the patching sense, but a manual asset restoration mod. It requires intermediate file manipulation and acceptance of glitches. No official method exists. Future players seeking Kratos should instead play the PS3 version via emulation (RPCS3) or accept the mod’s imperfections.

Some players have reported that entering the Konami code can unlock Kratos:

For over a decade, one of the fighting game community's most coveted "What If" scenarios played out exclusively on PlayStation consoles. Kratos, the Ghost of Sparta, tore his way through the Mortal Kombat universe in the 2011 reboot (MK9), delivering brutalities and iconic stage interactions that felt like a match made in NetherRealm heaven.

Fortunately, the PC modding community has solved this problem. This comprehensive guide will walk you through the exact methods, files, and fixes required to fully unlock and play as Kratos in Mortal Kombat 9 on PC. Why Kratos is Missing from MK9 PC