Another cross-posting :

An additional "source" could be this online, browser-based TDE game site : http://www.tde-games.com/
"Conspiracy At Ferdok" is a side-story of Drakensang 1, part two of this Adventure (which is called "Death Trail", I think) is commercial.
And - yes, these are official games. Chromatrix is the TDE license holder for all video games based on the TDE rule set.
The only drawback is, that these browser-based games play rather like text adventures. Almost no graphics at all, but you'll get another insight into Aventuria.

A second "background lore" thread has developed from a simple question for TROT books : http://forum.dtp-entertainment.com/v…?f=247&t=17879

Background lore : A few aventurian Gods : http://www.wiki-aventurica.de/index….tegorie:EN:God

Especially Rahja, which you learn a tiny bit about only in the ROA Trilogy : http://www.wiki-aventurica.de/index.php/En:Rahja

Small, German-language "demo" of the P&P background book "Father of the floods" : http://www.dasschwarzeauge.de/filead…-Leseprobe.pdf

This is how the "Aventurischer Bote", the magazine of Aventuria, looks like : http://www.dasschwarzeauge.de/filead…r_Bote_109.pdf

The rules explained on GameBanshee (why do I see it only now ?)
http://www.gamebanshee.com/editorial…-dark-eye.html

English-language discussion thead in the official TDE forums : http://ulisses-forum.de/showthread.php?t=2766

Ulisses has released a pack of maps covering Aventuria.

Here is the entry :
http://www.ulisses-spiele.de/index.php?id=3&tx_ttnews[tt_news]=494&tx_ttnews[backPid]=2&cHash=16d0ccaf05

(I hope this link works, otherwise you need to do simple copy & paste.)

The link contains the terms and conditions under which this mappack can be used.

The pack as such can be downloaded from there via the link called "Kartenpaket".
It is around 50 MB big.

Direct link : http://www.dasschwarzeauge.de/filead…artenpaket.zip

The map containing Ferdok and the area around both Drakensang games is covered by the file called "Das Zentrale Mittelreich.jpg"

Zantaclauth, an inofficial aventurian demon : http://rezensionen.nandurion.de/2011…n-gewinnspiel/
Zantaclauth gives away presents which look good at first glance, but have some nasty consequences later on …

The evolution of the TDE rule system books : http://www.wiki-aventurica.de/wiki/E…der_Regelwerke

(Display looks a bit odd in the Opera browser)

Meanwhile browsing through a thread in "Crystal's DSA Foren" containing regarding the NLT, I have followed a few of them, and repost them here :

- Interview with Guido Henkel : http://www.atarilegend.com/interview…nterview_id=23

- Horror novels written by Guido Henkel : http://www.jasondarkseries.com/

- Realms Of Arcania ( = NLT ) mailing list : http://games.groups.yahoo.com/group/realmsofarkania/

- Translator of the first two Realms Of Arcania games ? : http://bbrathwaite.wordpress.com/about/

- An overview over the last game : http://www.hardcoregaming101.net/arkania/arkania4.htm

- From Crystal's DSA-Foren : The required points for levelling up : As you can see, the German and the English-language games have different values there : http://nlt-hilfe.crystals-dsa-foren.de/page.php?211

- Realms Of Arcania in Russian language ? http://www.realms-of-arkania.narod.ru/index.htm

- A story of playing Realms Of Arcania : http://www.irontowerstudio.com/forum…ic,2365.0.html

As it turned out, there seem to exist different language versions for ROA games as well. Someone in the forums of Crystal reported buying a Spanish-language version. Moby Games lists titles for other languages as well.