What Is Ts Explorer On Steam Dlc?

I've just noticed this today, but, I haven't been on Steam looking at DLC content for ages, and there is nothing on this forum about it, but, several assorted items of DLC have a little badge next to it called TS Explorer, have DTG made an announcement about this, that I've obviously missed?

Cheerz, Steve.

 

This article might explain it.

 

Thank you, I had missed it.

Cheerz. Steve.