afaict Blorp is a Lemmy client. You know how on your phone, you can get to Lemmy through a web browser, but also through an app like Voyager or Jerboa? Well those apps, and the front-end of the website, are all called clients. And it’s also possible to have alternative web URLs that access the same server.

So there’s ttrpg.network, which is the name of the instance and also where the default lemmy-ui is hosted. But there’s also old.ttrpg.network, which accesses the same instance backend, but has an alternative client designed to look like old reddit, called Mlmym.

To me, Blorp looks like another alternative front end to Lemmy.