The Guardians of the Galaxy actually returned as a mini event not long ago , later on more events will return , I ' m sure . <| sep |> Smaller is all relative , Dota 2 and CSGO have 13 and 10 million players respectively that ' s a pretty large number compared to most competitive multiplayer games . It ' s funny though because even with the population differences , Valve managed to rework the engine not just the client of Dota 2 only 4 years after its initial open beta launch and included was the Demo Sandbox mode . If it took Valve , a company with fewer than 60 people working on Dota 2 , 1 year to entirely redo the engine and client , how bloody hard do you think it would be for Riot to get some people together to just make a Sandbox mode ? Nah , they spent years focusing on making champs and skins for $$$.