Only 23 games have ever been rated Adults Only in the 13-year history of the Entertainment Software Rating Board, according to the board's site.

If Manhunt 2's AO rating sticks it will be the twenty-fourth title to receive such a rating and the first console title, not including the Hot Coffee edition of GTA San Andreas, to get such a distinction.

Other AO titles include Playboy the Mansion: Private Party, which received its rating due to nudity and strong sexual content; the director's cut of Fahrenheit: Indigo Prophecy, which received the rating for Blood, Nudity, Strong Language, Strong Sexual Content, Use of Drugs and Alcohol and Violence; and Leisure Suit Larry: Magna Cum Laude Uncut and Uncensored, which received the rating for, well, everything.

Hit the jump for the full list of AO-rated "games." Brian Crecente

Title	Publisher	Rating	Content	Platforms
Playboy the Mansion: Private Party	Groove Media Inc.	AO	Nudity, Strong Sexual Content	Windows PC
Lula 3D	CDV Software Entertainment USA Inc	AO	Blood, Nudity, Strong Language,  Strong Sexual Content, Violence	Windows PC
Fahrenheit: Indigo Prophecy Director's Cut: PC CD ROM	Atari, Inc.	AO	Blood, Nudity, Strong Language,  Strong Sexual Content,  Use of Drugs and Alcohol,  Violence	Windows PC
Grand Theft Auto: San Andreas	Rockstar Games	AO	Blood and Gore,  Intense Violence, Nudity,  Strong Language,  Strong Sexual Content,  Use of Drugs	Windows PC, PlayStation 2, Xbox
Leisure Suit Larry: Magna Cum Laude Uncut and Uncensored	Vivendi Universal	AO	Mature Humor, Nudity,  Strong Language,  Strong Sexual Content,  Use of Alcohol	Windows PC
Singles	Eidos Interactive	AO	Nudity, Strong Sexual Content	Windows PC
Peak Entertainment Casinos	Peak Entertainment NV	AO	Gambling	Online, Windows PC
Critical Point	Peach Princess	AO	Strong Sexual Content,  Violence	Windows PC
Tokimeki Checkin!	Peach Princess	AO	Strong Sexual Content	Windows PC
Water Closet: The Forbidden Chamber	Peach Princess	AO	Strong Sexual Content	Windows PC
Snow Drop	Peach Princess	AO	Strong Sexual Content	Windows PC
X-Change	Peach Princess	AO	Strong Sexual Content	Windows PC
Thrill Kill	Virgin	AO	Animated Blood and Gore,  Animated Violence	PlayStation/PS one
All Nude Nikki	MacDaddy Entertainment	AO	Strong Sexual Content	Macintosh, Windows PC
Body Language	NUTECH DIGITAL	AO	Strong Sexual Content	DVD
Riana Rouge	Black Dragon	AO	Realistic Blood and Gore,  Strong Sexual Content	Macintosh, Windows PC
WET - The Sexy Empire	CDV Software GMBH	AO	Strong Sexual Content	Windows PC
All Nude Glamour	MacDaddy Entertainment	AO	Strong Sexual Content	Macintosh, Windows PC
All Nude Cyber	MacDaddy Entertainment	AO	Strong Sexual Content	Macintosh, Windows PC
Cyber Photographer	MacDaddy Entertainment	AO	Strong Sexual Content	Macintosh, Windows PC
The Joy Of Sex	Philips Media	AO	Strong Sexual Content	CDI
Playboy Screensaver :The Women Of Playboy	Sony Imagesoft (Publishing)	AO	Mature Sexual Themes	Macintosh
Crystal Fantasy	MacDaddy Entertainment	AO	Strong Sexual Content	Macintosh, Windows PC