I received a number of emails and other correspondence asking about the system under which the Dwimmermount megadungeon product is being written. Though this is spelled out in the FAQ over on the Autarch blog, I thought it worth stating even more emphatically: Dwimmermount uses Labyrinth Lord as its ruleset. I am doing this for a couple of reasons, chief among them being that Labyrinth Lord is the system I use in my home campaign and have used for several years. Like all referees, I've made some modifications and additions to the basic Labyrinth Lord rules (which will be published separately in the forthcoming Dwimmermount Codex series), but, fundamentally, the rules remain those presented by Dan Proctor in Labyrinth Lord, Original Edition Characters, and the Advanced Edition Companion, all of which I've used to varying degrees in kit-bashing my own Holmes Blue Book-like house rules.
I'm also doing this because, in my opinion, Labyrinth Lord most closely emulates the old school fantasy rules I prefer. Labyrinth Lord has all the delightfully quirky elements -- descending armor elements, multiple saving throws, three alignments, etc. -- and includes them unapologetically, which is how I like it. It's also worth noting that Adventurer, Conqueror, King, itself a very fine game, makes good use of the Open Game Content from Labyrinth Lord, meaning that, while there will be some differences, Dwimmermount will be usable with ACKS without much difficulty. The same, of course, goes for Swords & Wizardry, OSRIC, Basic Fantasy, Delving Deeper, and Lamentations of the Flame Princess. That's one of the many great things about old school D&D: differences aside, it's all quite compatible.
I'll have more details on Dwimmermount in the days and weeks to come, both here and elsewhere, but I wanted to make this particular point clear, since there seems to have been some confusion about it.