Finding Fall of Cybertron today is a challenge because it was from major storefronts like Steam in 2017 after Activision’s licensing agreement with Hasbro expired.
In the gaming world, a is a digital disc image that lacks regional lockout (DRM).
Later releases on PS4 and Xbox One (2016) included all previously released DLC. Minimum PC System Requirements
Transformers Fall of Cybertron (Global) (PC) - Steam - Digital Key