History YMMV / Traveller

** Not just "practically" but ''explicitly''. Foreven Sector (the next sector anti-spinward[[note]]to the left of on most maps[[/note]] from the fan-favorite Spinward Marches) will NEVER be canonically explored (outside of a few references in early adventures) precisely so referees can have a place to make their own.

** In ''GURPS Traveller'', Jack of All Trades is an advantage that grants a bonus to all skill defaults, allowing a character to use skills he doesn't have.

** In ''Mongoose Traveller'' (either version), Jack of All Trades removes the penalty for trying something unskilled, allowing a character at least a chance at doing just about ''anything''. It also notes that you can't teach the skill or learn it after character generation.

** Interestingly, ''Traveller 5'' in its introduction omits ''d20 Traveller'' and ''Hero System Traveller'' from its list of prior editions, though it does include ''GURPS Traveller'' as a "parallel edition".

** In ''Classic Traveller'', Jack of All Trades gave a character an effective Level-0 skill in ''everything''. It was very handy when, say, the party medic was unconscious and no one else had Medic skill. Scouts had the best access to the skill, with it appearing on 3 of their 4 skill tables, though you could also get it in Navy, Merchant, or "Other" career.
** In ''[=MegaTraveller=]'', Jack of All Trades allowed one free retry per level of skill on any task that fails. The rules don't exempt combat rolls, though most Referees did. Most careers could get the skill through the "Inborn" skill group.

** This wasn't the rule very long. The 1980 revised version of the first edition added an optional rule that a failed survival roll meant that character generation was over and the character simply entered play at that point, after serving only half a term of service for their last terms. [=MegaTraveller=] made entering play with a half term the main rule and dying outright the optional rule. Later editions kept this, and sometimes also gave the character that failed the survival roll a medical bill, a prosthetic limb, or some other drawback.

* MemeticMutation: The fact that, in early editions, it's possible to die during character creation. Far Future even sells a T-shirt that says "I died during Character Generation".
** Between aging and injuries, this is once again possible in Mongoose's second edition (the latest as of July 2018), though it's hard to accomplish unless one is trying for it (for instance, the player must choose to skip medical intervention).

** In ''Mongoose Traveller'', Jack of All Trades removes the penalty for trying something unskilled, allowing a character at least a chance at doing just about ''anything''. It also notes that you can't teach the skill or learn it after character generation.

* MemeticMutation: The fact that, in early editions, it's possible to die during character creation. Far Future even sells a T-shirt that says "I died during Character Generation".

** Mega Traveller: The meta-plot featured the Third Imperium descending into civil war after the assassination of the Emperor. Quite a few players objected to what they saw as the wholesale destruction of the setting.
** Traveller: The New Era: Many players found the computer virus that was the downfall of the Third Imperium implausible. The gearheads didn't like the retcon of HEPLAR reaction engines replacing reactionless thruster plates. Several people had problems with the sometimes wonky game mechanics as well, like the ability of an unarmored character to survive a direct hit from a plasma gun, or the ability of someone weaing a leather jacket to be completely immune to laser fire.
** Traveller 4: Many players didn't like the change to Mileau 0 (the Dawn of the Third Imperium) when what they wanted was to pretend the Rebellion never happened. Many others didn't like the changes in gaming mechanics, including the use of "half dice".
** Traveller 1248: As a continuation of the New Era timeline it had all of its baggage.
** GURPS Traveller: It made those who wanted the Third Imperium back happy, but the rules are quite different and generally more complex than other versions of Traveller.
** T20 (d20 Traveller): Hit points and class levels in Traveller? Many fans didn't think it was a very good fit.
** Mongoose Traveller: As it was back to the classic setting and with a rules set very similar to the original, some fans groused about how it was just more of the same, only different enough to annoy them.
** Traveller 5: Some fans say that the massive core book is incoherent and really needed to be edited down to something more workable before release. A re-release of the .pdf with some of the rules sections shuffled around (called "version 5.09") just gave them more ammunition. Amusingly, the table of contents of the 5.09 edition was not updated, and the page numbers are now completely inaccurate.
** Interestingly, Traveller 5 in its introduction omits ''d20 Traveller'' and ''Hero System Traveller'' from its list of prior editions, though it does include ''GURPS Traveller'' as a "parallel edition".

** In MegaTraveller, Jack of All Trades allowed one free retry per level of skill on any task that fails. The rules don't exempt combat rolls, though most Referees did. Most careers could get the skill through the "Inborn" skill group.

* {{Doorstopper}}: The latest iteration of the Traveller rules, Traveller5, clocks in at ''over 750 pages'', quite a few of them random roll charts.

** Traveller5: Some fans say that the massive core book is incoherent and really needed to be edited down to something more workable before release. A re-release of the .pdf with some of the rules sections shuffled around (called "version 5.09") just gave them more ammunition. Amusingly, the table of contents of the 5.09 edition was not updated, and the page numbers are now completely inaccurate.

* MemeticMutation: The fact that, in early editions, it's possible to die during character creation.

* CreatorWorship: There is a reason the 4th edition was called "Marc Miller's Traveller".

** Traveller5: Some fans say that the massive core book is incoherent and really needed to be edited down to something more workable before release. A re-release of the .pdf with some of the rules sections shuffled around (called "version 5.09") just gave them more ammunition. Amusingly, the table of contents of the 5.09 edition was not updated, and the page numbers are now completely inaccurate.

** GURPS Traveller: It made those who wanted the Third Imperium back happy, but the rules are quite different and generally more complex than other versions of Traveller.

* CreatorWorship: There is a reason the 4th edition was called \"Marc Miller\'s Traveller\".
* {{Doorstopper}}: The latest iteration of the Traveller rules, Traveller5, clocks in at \'\'over 750 pages\'\', quite a few of them random roll charts.
* {{Fanon}}: The setting practically invites players to fill in the blanks with {{fanon}}, referred to as \"IMTU\" for \"In My \'\'Traveller\'\' Universe\".

** MegaTraveller: The meta-plot featured the Third Imperium descending into civil war after the assassination of the Emperor. Quite a few players objected to what they saw as the wholesale destruction of the setting.
** Traveller: The New Era: Many players found the computer virus that was the downfall of the Third Imperium implausible. The gearheads didn\'t like the retcon of HEPLAR reaction engines replacing reactionless thruster plates. Several people had problems with the sometimes wonky game mechanics as well, like the ability of an unarmored character to survive a direct hit from a plasma gun, or the ability of someone weaing a leather jacket to be completely immune to laser fire.
** Traveller 4: Many players didn\'t like the change to Mileau 0 (the Dawn of the Third Imperium) when what they wanted was to pretend the Rebellion never happened. Many others didn\'t like the changes in gaming mechanics, including the use of \"half dice\".

* CreatorWorship: There is a reason the 4th edition was called "Marc Miller's Traveller".
* {{Doorstopper}}: The latest iteration of the Traveller rules, Traveller5, clocks in at ''over 600 pages'', quite a few of them random roll charts.
* {{Fanon}}: The setting practically invites players to fill in the blanks with {{fanon}}, referred to as "IMTU" for "In My ''Traveller'' Universe".

** Traveller: The New Era: Many players found the computer virus that was the downfall of the Third Imperium implausible. The gearheads didn't like the retcon of HEPLAR reaction engines replacing reactionless thruster plates. Several people had problems with the sometimes wonky game mechanics as well, like the ability of an unarmored character to survive a direct hit from a plasma gun, or the ability of someone weaing a leather jacket to be completely immune to laser fire.
** Traveller 4: Many players didn't like the change to Mileau 0 (the Dawn of the Third Imperium) when what they wanted was to pretend the Rebellion never happened. Many others didn't like the changes in gaming mechanics, including the use of "half dice".

** MegaTraveller
** Traveller 4
** Traveller 1248
** Traveller: The New Era

* JumpedTheShark: Any of the changes that [[BrokenBase broke the base]], but especially Virus.

* FollowTheLeader: Most of ''Traveller'''s roots are in the Science Fiction literature of the '60s and '70s, but its initial success might have something to do with it coming out right after ''StarWars'' was released.