The file "RJ439767.rar" contains the Japanese dōjin game (ラスティーダンジョンⅠ), developed by the circle Vitamin Gohan (ビタミンごはん). Review Overview: Lusty Dungeon I
Classic turn-based dōjin RPG with dungeon-crawling elements. Developer: Vitamin Gohan. RJ439767.rar
As a dōjin title, it is primarily available through Japanese digital storefronts like DLsite . The file "RJ439767