Nostos first launched for PC via Steam in December 2019. While the PC version has virtual reality headset support, the PlayStation Store description makes no indication of PlayStation VR support in the PlayStation 4 version.
Here is an overview of the game, via the PlayStation Store:
Nostos is a cross-platform multiplayer game in an open world setting, where oriental animation elements are found. You can explore with friends, discover historical sites and remains of war, build shelters, and fight, uncovering the truth hidden by time and tasting the past stories of hope or regret.
Watch a trailer below.