Joyous greetings, fellow Administrator! You are (hopefully) here because you want to enjoy Desktop Dungeons Extreme Edition! If not, then you should probably go buy Desktop Dungeons and then download this expansion. It will transcend all your previous gaming experiences and leave you wistfully staring into the distance, waiting for the next release from us or the original developers.*
Desktop Dungeons Extreme Edition is a developer-sanctioned expansion for the original game. However, please do not ask us to change the base game, as it is against the wishes of the devs. While this may be developed independently of them, we rely on their continued endorsement and have a great deal of respect for the original product. Heck, if we didn't love it so much we would't be making this humongous thing.
Release will be done in 5 stages (one release for each cardinal direction, and then central and Gaan-Telet area release), each of which will add new classes, dungeons, items, subdungeons, and probably a few more things here or there. If you want to get in on content more actively and beta test upcoming releases, we have a Trello where we organize stuff and release weekly updates. Just pop on over to the Contact page if you want to participate, or check out the News page if you want to see what we are/have been doing.
One final warning, before you hop into the thick of things: As the name implies, Desktop Dungeons Extreme Edition is filled with fairly challenging content. While almost all of it (like classes and dungeons) will be accessible to just about anyone, regular human beings may have a very difficult time obtaining 100% completion for this expansion (much like the base game). Some people may have trouble unlocking all available content, although anyone capable of beating the base game should be able to manage. Released dungeons will probably not be nerfed, as the purpose of this Extreme Edition is to provide challenging content for those who have completed the original game. So just remember, you've been warned, although hopefully the challenge will sharpen your skills quite a bit, and don't be afraid to just try it out.
On that note: Welcome, and happy adventuring to you all!
*Extreme edition development team does not guarantee honest advertising.