3G Studio's partnership with Eldorado Resorts to produce online gaming, a deal announced last week, means the Reno-based video game developer is headed for a large-scale expansion, President James Kosta says.Eldorado Interactive, a subsidiary of Eldorado Resorts, plans to launch its free-to-play slot machines later this month, and it also has a similar poker product in beta testing that should go live in November. A version of the poker game played for real currency is expected to be released by the first quarter of 2013 as Eldorado Interactive earns certification and licensing from the state Gaming Control Board.To handle the …