A pity you have not mentioned IVAN, it might have the best deity system known to roguelikes. There are currently 15 deities, each of whom has their own personality, and each monster, item, and material is attached to some deity, so they are well tied to the gameplay. You can get various benefits by worshipping the gods (you can pray each 3 or 4 hours), and you can worship several gods at once, but they need to like each other, which depends on their alignments. So you could for example worship the three neutral gods (Silva, the goddess of nature, Loricatus, the god of smithing, and Mellis, the god of trade), or you could go slightly more lawful and worship Sophos, the god of knowledge (who is weakly lawful) instead of Mellis, who is slightly chaotic. Or you could try to worship all four, hoping that Sophos will like you for being friends with Loricatus and Silva, despite that you are also friends with Mellis (although this could be a bit more risky). There is a Wisdom stat, and a higher value would allow you to increase the range of gods that you are worshipping (so you could successfully worship 5 gods at once, for example).
ADOM: It is not true that the only way you know about the Paragon of Order challenge is by reading spoilers. There is a fortune cookie which says "They say that a paragon of Order must not violate his beliefs by any means", which is a big hint that there might be a reward for committing no chaotic acts*. I think that, in golden days of ADOM, many people have tried the challenge and get the reward, but they all failed due to another requirement, which was not hinted about anywhere and IMO is not well thought out: that no lawful being can die by any means. They all tried to approach the challenge in a logical way: start lawful and never do anything wrong -- which would cause all lawful beings to be enemies of your enemies, and it would be quite sure that a few dwarves and blink dogs would die. The truth was discovered later by unlawful techniques, and shortly after the challenge was won (actually both of these were done by me), and some time later there was another person who claimed to win some more difficult challenge which involved getting the Platinum Girdle. I don't know what happened later, as I have left the ADOM community (I understand that Darren has won).
General: the choice of subjects for the podcast seems biased towards commercial games (after the Binding of Isaac there will be 8 episodes about commercial games (two of which are semi-roguelikes) and 5 about non-commercial ones)... one thing I like about roguelikes is how such great games as NetHack, Angband, ADOM, and Crawl (I am not sure about Rogue itself) have been created by developers for themselves and people like them, not for the masses, and can be played for free, as the developers simply want people to play their creations (and if you want to thank them, you can donate, discuss the games, promote them, or release your own free roguelikes). Commercial bias goes the other way...
* I remember an opinion that you cannot win ADOM without spoilers, as there are lots of things you do not know about. IMO this is not true, as all the important things are covered by fortune cookies, Mad Minstrel songs, Ancient Dwarf's hints, and general logic.