NOW LIVE! Today's the day you meet your new best friend. You don’t have to leave Wolfy behind... In 'Pets & Sidekicks' your companions level up with you!

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Message: <blockquote data-quote="Alzrius" data-source="post: 9631690" data-attributes="member: 8461">The answer is "it depends," largely on what edition you're trying to reproduce.For instance, most pre-3E editions didn't have quite the mechanical intricacy of 3E, so it wasn't that hard for enterprising members of the OSR to go back and re-tool what was in the 3.5 SRD for various other purposes. But even then, some creative work had to be done. For instance, For Gold & Glory (an AD&D 2E retroclone) has a mechanic called THACO ("To Hit A Combat Opponent") because they can't use THAC0 ("To Hit Armor Class 0").The problem is that the 5.1 SRD is quite a bit thinner than what's in the 3.5 SRD. You could probably still use it to reproduce something like Original (i.e. 1974) D&D just fine, and maybe even AD&D 1E, but in the latter case certain things (e.g. proficiencies, psionics, etc.) might be a bit awkward (which isn't to say they couldn't be done, but they'd probably be at least slightly different, a la the THACO/THAC0 difference given above).4E, however, is a particularly bad example, as the game seems to have been designed in a way to frustrate being easily recreated in this manner (e.g. the use of small symbols to indicate things like monster types). Again, that doesn't mean it can't be done (just look at <a href="https://www.enworld.org/threads/introducing-orcus-a-4e-retroclone.685145" target="_blank">Orcus</a>), but it's a lot more work to stay away from potentially actionable areas.</blockquote>

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