https://wccftech.com/horizon-forbidden-west-ps4-free-upgrade-ps5/

The sequel to Horizon Zero Dawn, Horizon Forbidden West, will be also be released on PS4, Sony has confirmed.

Guerrilla Games’ Horizon sequel has only been presented as a 2021 PS5 title, but in a similar fashion as the upcoming Spider-Man: Miles Morales, Horizon Forbidden West will also become available on Sony’s current-gen console. The PS4 version of the Horizon sequel will release alongside the PS5 version next year, and those purchasing the PS4 version will be offered a free PS5 upgrade. The same applies to the upcoming Sackboy A Big Adventure.