''Doctor Who: Worlds in Time'' was a MassivelyMultiplayerOnlineGame based on ''Series/DoctorWho''. It was created by Three Rings, the developer of ''VideoGame/PuzzlePirates'', and used a similar gameplay mechanic where various tasks were represented as puzzle minigames. It opened in 2012 and closed in 2014.

The game begins with the Doctor arriving in your -- yes, ''your'' -- bedroom in the middle of the night and recruiting you to help him solve a mystery that's threatening to cause the entire universe to shatter into innumerable pieces. (Again.) Players go on Adventures in which they investigate the mystery, collect up broken bits of the universe, and/or thwart the designs of alien races seeking to exploit the situation for their own ends. Each player character is equipped with a "gadget", similar in design to the Doctor's sonic screwdriver.

Each set of Adventures is associated with a different planet that has been featured in the series, beginning with Earth and culminating (perhaps inevitably) with Skaro, home of the infamous Daleks.

!!''Doctor Who: Worlds in Time'' provides examples of the following tropes:

* BeePeople: The Vespiforms have a Bee People society, with a Queen and a lot of Drones.
* DeathIsCheap: If you die, the game just remarks that it's a good thing we have a time machine, and lets you have another go.
* GroundhogDayLoop: One subset of Adventures involves a period of time caught in a time loop, represented as a string of around half a dozen adventures which each begin in the same place at the same moment.
* MobySchtick: In the section set on [[Recap/DoctorWhoS31E2TheBeastBelow Starship UK]], there's a plot line involving an alien captain learning of the Star Whale and coming to hunt it; an early attempt causes him to lose a leg, which only makes him more determined.
* PersuasionMinigame: One of the minigames is this.
* RecklessSidekick: Would it be ''Doctor Who'' otherwise? One of the final Adventures begins with the Doctor piloting the TARDIS into the Daleks' central control. Before popping out to look around, the Doctor instructs the player in no uncertain terms to stay in the TARDIS where it's safe. After he leaves, the game waits a {{beat}}, then displays the usual "Click here to exit the TARDIS" prompt.