The Prey in the Darkness DLC content pack for Batman: Arkham Asylum will be PS3 exclusive for America announced Eidos. Only in America though, as it will be released on both Xbox 360 and PlayStation 3 in other territories.

The reason for this is probably to keep up the incentive for gamers to purchase the PS3 edition of Batman: Arkham Asylum over the Xbox 360 version, since the PS3 edition exclusively allows you to play as The Joker. Because of that exclusivity, the PS3 edition has sold 303,000 units to the Xbox 360 versions 290,000 in August according to the NPD.

The Prey in the Darkness add-on strongly resembles the Insane Night Map Pack, which Eidos released to both Xbox 360 and PS3 owners free of charge last week. As with that release, Prey in the Darkness includes two new maps: Heart of Darkness emphasizes toe-to-toe action at the Arkham Pumping Station, while Hothouse Prey focuses on stealthily subduing enemies at the Abandoned Glasshouse.

The Prey in the Darkness free DLC will be released tomorrow as part of Sony’s Thursday PlayStation Network updates.

Via GameSpot