The PlayStation 4 version of Princess Crown included as an early purchase bonus for 13 Sentinels: Aegis Rim in Japan will be available to buyers on January 31, 2020, publisher Atlus and developer Vanillaware announced.
All physical copies of 13 Sentinels: Aegis Rim with a green seal on the box include the code required to download Princess Crown, as well as all copies of the Premium Box limited edition. The digital edition of the game will include Princess Crown until January 15, 2020. Atlus has not announced any plans to sell Princess Crown as a standalone digital title.
The PlayStation 4 version of Princess Crown is a port of the 2005-released PSP version (it was first released for Sega Saturn in 1997). The screen resolution is also based on the PSP version.
Source : https://gematsu.com/2019/12/13-sentinels-aegis-rim-early-purchase-bonus-princess-crown-ps4-port-launches-january-31-2020-in-japan