Outplay has revealed that its latest tower defence title Castle Creeps TD hit more than 1.5 million downloads in its first four days.

The game was launched on January 5th and had achieved the milestone by January 8th.

Continuing the momentum

2016 was a big year for Dundee studio Outplay, with it officially becoming the UK's biggest independent mobile game developer and acquiring Raid HQ developer Eight Pixels Square.

And now the studio has started 2017 strongly with a follow-up to its 2014 title Alien Creeps TD.

The tower defence genre finds itself in an odd position in 2017, with its biggest franchises - Plants vs. Zombies and Fieldrunners, for instance - experimenting with new approaches.

But if Castle Creeps can keep the momentum going, it will be proof positive that there is plenty of life in it.