: The .7z extension indicates it is compressed with 7-Zip . You will need a utility like 7-Zip or WinRAR to extract the game files before playing.
The file appears to be a compressed archive containing a specific fan-localized or modded version of the adult mecha RPG, RaiOhGar: Asuka and the King of Steel . Game Overview: RaiOhGar
Developed by GapTax and published by Kagura Games, RaiOhGar is a turn-based RPG that blends giant robot (mecha) combat with a romantic subplot.
The specific naming in your file suggests a community-distributed version:
: Community repacks like this often come with any necessary adult "decensorship" patches pre-applied, which are otherwise sold separately or provided via official external links for the Steam version. RaiOhGar: Asuka and the King of Steel on Steam
: You play as Kouta, a pilot who, along with his partner Asuka, uses the super robot RaiOhGar to defend Okigashima Island against the evil organization Trizon.
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