The ".rar" extension indicates a compressed archive, typically used for distributing the game's installation files or "save data" folders.
Ecstasy Elf Shotenken -Naruru's Sexy Adventure- by MediBang. Ecstasy Elf Shotenken -Naruru's Sexy Adventure - ProtonDB ecstasy_elf_shotenken.rar
Ecstasy Elf Shotenken -Naruru's Sexy Adventure- by MediBang. Ecstasy Elf Shotenken -Naruru's Sexy Adventure - ProtonDB ecstasy_elf_shotenken.rar