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<blockquote data-quote="Mannahnin" data-source="post: 8158350" data-attributes="member: 7026594">Labyrinth Lord is based on B/X, though with a bunch of little tweaks (and some additions from AD&amp;D, like additional weapons and armor types), like giving clerics a spell at first level.&nbsp; The xp charts are also tweaked and there are other little changes here and there.&nbsp; At least one of the monsters was renamed too (Thoul to Throghrin; I think there may be a few others).Some of this was due to the author's preference, and some of it was change for the sake of change, because it was one of the first retro-clones and people were less confident then of how firm the legal ground was for an EXACT clone.&nbsp; US copyright law says game mechanics aren't subject to copyright, but something along the lines of &quot;unique artistic expressions thereof&quot; are subject.&nbsp; So one of the rationales behind all the little changes was to make it more clearly legally distinct.&nbsp; For a while it was one of the most commonly-used systems for OSR module publishing (Stonehell and Barrowmaze both used it, for example, IIRC), but eventually a lot of B/X fans got annoyed at all the little changes which made their LL rulebooks not perfectly compatible with their original B/X books, so it's fallen out of favor.</blockquote>

[QUOTE="Mannahnin, post: 8158350, member: 7026594"] Labyrinth Lord is based on B/X, though with a bunch of little tweaks (and some additions from AD&D, like additional weapons and armor types), like giving clerics a spell at first level. The xp charts are also tweaked and there are other little changes here and there. At least one of the monsters was renamed too (Thoul to Throghrin; I think there may be a few others). Some of this was due to the author's preference, and some of it was change for the sake of change, because it was one of the first retro-clones and people were less confident then of how firm the legal ground was for an EXACT clone. US copyright law says game mechanics aren't subject to copyright, but something along the lines of "unique artistic expressions thereof" are subject. So one of the rationales behind all the little changes was to make it more clearly legally distinct. For a while it was one of the most commonly-used systems for OSR module publishing (Stonehell and Barrowmaze both used it, for example, IIRC), but eventually a lot of B/X fans got annoyed at all the little changes which made their LL rulebooks not perfectly compatible with their original B/X books, so it's fallen out of favor. [/QUOTE]

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