Besides the usual suspects - GTA Online, plus potential sequels to Red Dead Redemption, Max Payne and GTA - Rockstar is apparently working on a game which they're describing as an "asymmetrical co-operative stealth" title.
Rockstar Toronto (The Warriors) are hiring a gameplay designer who needs to be experienced in "weapon design and destructible environments", as well as working with both single- and multiplayer-based sandbox environments.
The ad asks for "advanced physical and digital prototyping skills to establish the pillars of the asymmetrical cooperative stealth experience required." Could this be Max Payne 4, or perhaps Agent? Or even something entirely different? Time will tell, but we look forward to finding out more.
Thanks, GamesRadar.