
Previously released Injustice 2 extra characters such as Red Hood, Sub Zero, Black Manta, Starfire, and Raiden, are also available on PC. The game's newest character, Hellboy, launches on November 21 for PS4 and Xbox One, but won't be available on PC until "a later date."
Whereas the console version of Injustice 2 was developed by NetherRealm Studios, the PC edition was developed by QLOC. Based in Poland, QLOC is a quality assurance, localization, and port studio. It has worked on games like Super Street Fighter IV: Arcade Edition, BioShock 2, and Rime. You can see the PC edition's system requirements below.
Source: GameSpot