"The first installment of downloadable content for Grand Theft Auto IV on Xbox 360 will be a full extra 'episode,' and is set to hit in the first quarter of 2009, Take-Two CEO Ben Feder revealed on the company's call to investors today. Take-Two's fiscal year starts in November. Feder declined to provide any further details, but now we know the DLC is forthcoming for Xbox 360. No mention was made of PS3 DLC."
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