Variable Geo (ヴァリアブル・ジオ, Variaburu Jio), also known as V.G., is a Japanese 2D fighting game and eroge series developed and published by TGL for consoles and under their Giga brand for home computers.

The series focuses on an all-female martial arts competition where participants are required to promote various family restaurants by acting as waitresses when not fighting.

The original Variable Geo was released in 1993 for PC-9801; after this first game, the series continued on home computers as an adult-oriented eroge including visual novel spin-offs, while a separate rebooted sub-series was made for consoles called Advanced V.G.

Set in a near-future version of Japan, the games tell the story of a martial arts tournament created to determine the country's strongest woman.

The winner of the tournament is awarded the title "Virgin Goddess", as well as a large cash prize of ten billion yen, and a house erected anywhere on the planet she should choose.

In 1998 ADV Films released the animation subtitled and dubbed on VHS, and later re-released in 2003 on DVD, as part of the celebration of the series' tenth anniversary.

Later games would add a special meter (identical to the system that was standardized by Super Street Fighter II Turbo) that would fill as the player inflicts or receives damage.

Filling the bar would result in a stock of "Energy" being acquired, which could either be used for one of a number of enhanced super special attacks, or saved for later use in the match.

[5] Another review from the same publication for the first OVA noted that the series includes various lesbian characters, along with themes about "DNA manipulation, demonic possession, mind control, and body altering drugs."