Attack Animal Gakuen (Japan)

In Attack Animal Gakuen, players engage in mahjong matches following traditional Riichi Mahjong rules. The primary objective is to defeat opponents, typically schoolgirls or other female characters, in a series of mahjong battles. Each time the player wins a round, a piece of the opponent's clothing is removed, or a special animated scene is revealed, depending on the progress and the opponent.

The core gameplay revolves around building valid mahjong hands (known as "yaku") and declaring "tsumo" (self-draw) or "ron" (take a discard) to score points. The game might feature simplified elements or specific rules to suit console players. Players need to understand the basic rules of mahjong to progress. The game typically offers various difficulty levels, with increasingly stronger and more intelligent opponents. Additionally, there might be special items or abilities that help the player change the course of a match. While the "adult" element is a highlight, at its core, Attack Animal Gakuen remains a strategic mahjong game requiring skill and a bit of luck.