Weekend recommendation: Go underground with Mini Metro | Continue Play

"It’s currently Steam only – so those of you wanting something free from DRM will have to wait and hope it pops up as a standalone download or appears on GOG.com, while a mobile version for iOS and Android devices is planned. But if that doesn’t bother you – and let’s face it, most gamers don’t even view Valve’s platform as DRM, despite it being the exact definition of it – then I thoroughly recommend giving it whirl.

You’ll never look at an underground map in the same way again."