Now that's a cash-cow. Even in the last quarter Take-Two sold 5 million copies of Grand Theft Auto V. Ever since the release in 2013 (consoles saw the release first) they now have sold 65 million copies. Rockstar will soon announce which new projects the studio is working on. The numbers appeared in the released Fiscal Year 2016 results that got published. 

The company expects even better reults for fiscal year 2018 (that fiscal year starts in April 2017), likely due to the unannounced products that will soon be announced (E3?). 

GTA5 was released in 2013 and launched on XBox 360 and PS3 first. Incredible as it may sound, the company did not have any profit yet had a loss of 8.3 million dollars, the created revenue was 1.4 billion dollars (I kid you not).