Welcome to the A to Z Blogging Challenge for 2016!
Let's start this off with one of the earlier adventure series and consequently one I am currently wrapping up for my kids.
The Slave Lords series was marketed under the "A" module code. The series included four adventures, A1 to A4.
Back in 2013 Wizards of the Coast published a new A5 The Last Slave Lord in Dungeon Magazine #215. In 2015 a new hardcover of the adventure came out which included an introductory adventure A0.
The "A" series came from the adventure "Assult on the Aerie of the Slave Lords". Though for me I always thought they were "A" since they were for Advanced Dungeons & Dragons, even though other adventures came before it. Of course my DM also was confused why it was called "A" so he did what he usually did, he added a bunch of Assassins to it.
These adventures were used as tournament level play at the AD&D Open Tournament for Gen Con XIII (1980). The adventures were then published in 1980/1981. I played it myself around 81 or 82.
Ask 10 gamers and you are likely to get 10 different opinions on these adventures. I remember having a character die in it a trap in one of the various traps found in these.
So far my kids are doing well, but it has by no means been a cake walk for them. We are down to the last adventure in the series. I have to figure out if I want them to go through the first part without all their gear or not. I get why it is there, but it isn't something I *need* to do with them right now.
Here are some other postings on this module. Always interesting to read what others have experienced.
http://www.metagamemastery.com/2011/09/26/annotated-a1-slave-pits-of-the-undercity/
http://www.thedelversdungeon.com/forums/viewtopic.php?f=2&t=227
http://bloodofprokopius.blogspot.com/2012/02/re-imagining-slave-pits-of-undercity.html
http://grognardia.blogspot.com/2010/11/retrospective-slave-pits-of-undercity.html
http://bxblackrazor.blogspot.com/search/label/a1-4
http://dungeonfantastic.blogspot.com/2014/12/review-a1-4-scourge-of-slave-lords.html
And Peter's detail into each adventure.
http://dungeonfantastic.blogspot.com/2014/10/review-a1-slave-pits-of-undercity.html
http://dungeonfantastic.blogspot.com/2014/10/review-a2-secret-of-slavers-stockade.html
http://dungeonfantastic.blogspot.com/2014/10/review-a3-assault-on-aerie-of-slave.html
http://dungeonfantastic.blogspot.com/2014/11/review-a4-in-dungeons-of-slave-lords.html
The A series was also made part of the D&D 5 playtests, so it was possible to grab all the conversion needed. So far playing this with D&D 5 in 2016 is just as fun as playing it with AD&D 1 in 1982.
Buy it at DriveThruRPG, A0-A4: Against the Slave Lords (1e).