For those of you who have a look at this feature and have their interests piqued then you can find the games website here and information on this faction specifically here.
The play-test rules can also be located for free download from this page here.
Those of you who are familiar with a certain race *cough* Squats *cough* from another game system will certainly find these models of interest. It's also worth noting that the other faction bears a startling resemblance to a certain cult that liked to steal genes but I'm sure that's just coincidence, lol.
Here are the Digger Corps...
The Starter Set comes with a leader and his followers that consist of five Digger Corps troopers and a couple of Og Corpsmen.