Launching in 2012, fans can now play an early version of the browser-based, free-to-play multiplayer title through its official website.
Designed as a pick-up-and-play experience for long-running series fans, players can create their own character from a choice of four races and numerous customisation options.
The Doctor will then send players on missions to a number of locations, including Skaro, Messaline, The Library and New New York, and will feature appearances by the Daleks, Cybermen and the Weeping Angels.
Doctor Who: World in Time will be supported by micro-transactions, allowing players to purchase 'Chronons' that help with mission progress, character customisation and building new contraptions.
"As a huge Doctor Who fan, the chance to develop this game with BBC Worldwide was a dream opportunity," said Three Rings Design CEO Daniel James.
"We've worked to provide Doctor Who fans an experience that matches the quality and imagination of the TV show, and a forum to introduce casual gamers to this remarkable world with an experience accessible to players of all levels."
Doctor Who: The Eternity Clock was recently announced for release on PS3, Vita and PC early next year.
> Doctor Who new Christmas special trailer unveiled by BBC - watch
View screenshots of Doctor Who: World in Time below: