Having completed its metamorphosis into Dota 2 Reborn, Valve's hit free-to-play MOBA has become the first game to run completely on the new Source 2 engine.

Dota 2 - now sourcier than ever.

Dota 2 Reborn had been in beta since June of this year. Among the changes are an overhauled UI and tweaked game modes. A new 20-player mode was debuted at The International contest in August, which can lay claim to the biggest prize pot in eSports. $18m was up for grabs, with the eventual victors, Evil Geniuses, walking away with a cool $6m for their efforts.

The Source 2 engine was announced at GDC in March. Like its predecessor, introduced in 2004's Counter Strike: Source, it's available for free to aspiring developers and modders everywhere.

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Dan Whitehead

Dan Whitehead

Senior Contributor, Eurogamer.net

Dan has been writing for Eurogamer since 2006 and specialises in RPGs, shooters and games for children. His bestest game ever is Julian Gollop's Chaos.