With the $18 million International Dota 2 Championship tournament completed , and the Fall Majors coming soon, the growth and success of Valve's MOBA leaves a lot of questions about the future of Counter-Strike: Global Offensive , which may make the transition to the new Source 2 engine.

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"I’m sure it’ll end up on Source 2 at some point," Valve's Erik Johnson said. "Counter-Strike is growing." Behind Dota 2, CS:GO is the most actively played game on Steam.Johnson declined to discuss any additional Valve games coming to Source 2. "Dota 2 is all we're talking about right now."More notably, though, is the absence of a large-scale tournament run by Valve. Valve's competitive first-person shooter is skyrocketing in active players and spectators. The Dota 2 International Championships have been massive successes, growing each year in attendees, merchandising, and in-game purchasable content. Before the event began, Valve earned nearly $70 million from in-game purchases supporting the event. That in mind, an International-style even has to be on its way for Counter-Strike, right?"I don’t know that it has to be coming," Johnson said."We’re pretty comfortable with different projects taking different approaches to solve similar problems," he explained. "As a company we actually learn more when we do that. If we all point everything in the same direction, we’d have a real blind spot for when we’re screwing up. In some ways, you want to diversify a bunch of decisions across different projects because you zero in on the right answer quickly, as opposed to 'we have this thing that’s working, everybody do that right now."For the time being, Valve's primary focus is launching Dota 2 Reborn out of beta -- thus making the Source 2 client the primary Dota 2 game.Valve is getting "pretty serious" about launching its first Source 2 game now that TI5 is over. "Fundamentally what Source 2 does is let everyone at Valve who makes game content be more efficient, it allows us to do everything more efficiently."For a full recap of TI5, find out what happened at The International 5 , where Valve revealed new 12 vs. 12 multiplayer features coming to Dota 2.If you couldn't attend but want to know what it was like, go behind the scenes of TI5 and check out the best merch . We also checked out the new Secret Shop VR demo and walked away impressed. Finally, be sure to check out the replays for every day of the event on IGN.

Mitch Dyer is an Editor at IGN. Talk to him about Dota 2, movies, books, and other stuff on Twitter at @MitchyD and subscribe to MitchyD on Twitch