In Gag you play Gary Tusker, a secret service agent who is specialized in preventing sexual and religious perversions. He is very professional, though he is - according to the manual - an "impotent virgin" too. While studying at Antarctic Academy for Secret Agents, he was once bitten in his private parts by a penguin with poison teeth, which resulted in his particular condition.

In the intro is shown that Marquis de la Bourbon, a retired Air Force fighter pilot & drunkard, and his wife Margo, who practices witchcraft, are involved with a group of Satan worshipers, known as the Dark Brothers. Gary is assigned by his lovely boss Lucy to investigate what is going on in Castle de la Bourbon and what the evil plans of the Dark Brothers are.

Gag is a 1st POV, point-and-click and inventory-based adventure game with pre-rendered backgrounds and full motion video scenes. The game includes a few mini-games, including "Gagboy," a sexual version of Tetris (which was made available for download and can be found on the web). Gag was only published in Russia and in the Netherlands. The latter version is English spoken. A sequel was made but only published in Russia.

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