This distribution is timed to coincide with the Play at Home initiative, which, in turn, was launched against the backdrop of the coronavirus pandemic. Moreover, it is offered to install the Horizon Zero Dawn Complete Edition for free. It includes not only the game, but also The Frozen Wilds expansion, the storm tracker costume and the powerful bow of the Karh tribe, the PS4 theme and other additional content.
You can install the game for free until 06:00 on May 15 using this link.