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ShortQuests -- Pocket Sized Adventures! An all-new collection of digest-sized D&D adventures designed for 1-2 game sessions.

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Message: <blockquote data-quote="aramis erak" data-source="post: 9875993" data-attributes="member: 6779310">Some other games where that kind of incompatibility is present:Traveller: The New Era was a  different engine (well, distantly related engine to be totally pedantic) from Classic Traveller and MegaTraveller. T4 is a redesign from first principles of Classic, but was as incompatible with CT/MT as it was from TNE (its immediate predecessor).Gamma World used the Marvel Super Heroes color table engine for one edition, an AD&D derivative for several, and was itself a merely semi-compatible follow-on to Metamorphosis Alpha. Then there's the D&D 4e version of it. And the completely-a-port Metamorphosis Alpha to Omega (Amazing Engine).Arrowflight - 1st ed was  a d6 count successes dice pool; 2nd is a 2d6 ≤ stat+skill; 3rd is supposedly also the 2d6 versionAnd more GDW... Twilight 2000 1e was a 3 difficulty percentile system (1d100≤ skill × diffMod), using 3d6 stats; Twilight 2000 2.0e was a 1d10 system with 2d6 stats and the same 3 difficulties (and a fourth for combat only) (1d10 ≤ skill × Diffmod); Twilight 2000 2.2e looks just like 2.0 unless you read in detail, and is 1d20 with 5 difficulties (1d20 ≤ (stat+Skill)×diffmod), T2013 (aka T2k 3.0) was skill d20's; T2K 4e is Year Zero Engine Step Die version (atts d6/d8/d10/d12, skills same, count successes.) They're the same only in name and setting conceits; 2.0 and 2.2 use the same char gen and mostly the same combat (except autofire).And that's not counting games licensing non-gaming IP...Dragonlance - AD&D for the 1st edition; The SAGA System (not to be confused with SWSE) doing Card Based play in DL5A, then a d20 port of some description that I didn't bother with.Marvel: 3 color-table versions (MSH, Revised MSH, MSH Advanced Set), SAGA System (as DL5A, but actually changes the core mechanics a good bit, and different deck even), The Marvel Universe edition, and now the System 616 Marvel Multiverse using a 3d6 engine.Star Wars had 3  WEG editions (1.0, 2.0 2.1 aka 2R&E) with some notable differences). 3 d20 editions (d20 and d20 revised, then SWSE) with the third of those (SWSE) being essentially the prototype for D&D 4e... and much loved... plus one FFG edition which is now (due to Asmodee «bleep»ery) republished by Edge Studios.Star Trek had 2 Fasa Editions... highly compatible those two; percentile attributes and percentile skills, lifepath char gen. Then the LUG version, wholly new system with different stat range (1-5 for PCs) and similar skill range (0-5), a different kind of lifepath char gen. Then the Decipher version (2d6 stats, 2d6 skill checks with skills in a 0-10 range and a stat mod), now Star Trek Adventures (2d20 to 5d20 < Stat+skill) with yet another different lifepath system, and an optional point build and even build-in-play.</blockquote>

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