The only official way to play the remake on a PC is through the PlayStation Plus (formerly PS Now) streaming service, which requires a subscription and a compatible controller. Alternative PC Methods

There is currently no official PC download for the Shadow of the Colossus

Sony has slowly ported its legacy titles. There are rumors (unconfirmed) of a Shadow of the Colossus PC announcement during a potential "Bluepoint Collection" or ahead of a Shadow of the Colossus 2 reveal. For now, patience is a virtue.