Draugoth
Gold Member

Instead, they opted to start work on a new series with more colourful environments, as opposed to the grittier, greyer worlds of Killzone.
"We were done with it as a team," Postma explained. "As a studio, we needed to refresh the palette. It was, by choice, the opposite of Killzone."
Postma also suggested that the more diverse nature of the Horizon games means it appeals to a wider audience.