The release, titled Grisaia: Phantom Trigger 04, also has language support for Japanese, English, and Chinese (Simplified).
Prototype released Grisaia: Phantom Trigger 01&02 on the Switch on June 25, and released Grisaia: Phantom Trigger 03 on July 22.
Prototype most recently published the fourth volume of Frontwing’s Grisaia: Phantom Trigger game digitally for the Nintendo Switch in Japan on September 17.
Frontwing revealed on Sunday that it will release the Grisaia: Chronos Rebellion smartphone game this fall.