The Horizon: Forbidden West PlayStation 4 Standard and Special editions do not include a free PlayStation 5 upgrade
PS Plus games February 2023: Get Horizon Forbidden West for free
Horizon Forbidden West is $10 cheaper on PS4, still PS5 compatible - Polygon
Horizon Forbidden West (for PlayStation 5) Review
Horizon Forbidden West' is cheaper when bought on a browser
Horizon Forbidden West Review - Gideon's Gaming
Horizon Forbidden West Launch Edition - PS5, PlayStation 5
How to Upgrade PS4 Version to PS5 Version
Horizon Forbidden West - Exclusive PS4 & PS5 Games
PSA: buy Horizon Forbidden West's PS4 version to play it on PS5 for cheaper - The Verge
The Witcher 3's Next-Gen Update: How to Upgrade PS4 Games to PS5 Versions - CNET
Horizon Forbidden West' pricing mess underscored need to standardize PS5 upgrades - The Washington Post
Horizon Forbidden West Complete Edition Coming to PC