Raven Crowking said:
Well, of course not -- but there is a big difference between an apatosaurus or triceratops appearing out of the blue as a riding animal in an area known to the PCs , and a creature hiding away from civilization in the fastness of a deep wood, or the depths of an unexplored ruin.
One would assume that the herd animals in a given region would be known to those dwelling there, and that the common threats in that region would likewise be known. A herd of dinosaurs would almost certainly be known over the area it roamed (and, unless a Lost World scenario was in play, it would almost certainly be migratory).
Does the DM need to explicitly mention all of the animals in an area? Buffalo or even cattle in massive herds roaming Australia pre-european settlement, would be every bit as out of place as dinosaurs in Europe during the middle ages. Yet most americans/europeans wouldn't bat an eye at it because those creatures are "normal" to their backgrounds.
Remember even physics is a house rule in D&D.
There's no reason why dinosaurs couldn't be as common as the dire tigers, dire Lions and other dire creatures that seemingly infest your "normal" D&D setting despite the fact that many of them would be equally out of place in plenty of enviroments.
There's absolutely no reason why dinosaurs have to be any more uncommon or remarkable than pigeons or rats (both of which were completely unknown in large chunks of the pacific pre-European contact). Other than most poeple's knee-jerk association is with dinos being something strange and bizarre, from the depths of time and space.
There's also several currently existing creatures (crocs and sharks) that have existed essentially unchanged from the time of the dinosaurs, that nobody would bat an eye at encountering, because they are considered "normal".
In short, Dinosaurs might be something "strange" that "has to be accounted for" in your view of the world. But there's no inherent reason that has to be the case.
Raven Crowking said:
Also, note, that the long-term player questioned riding a dinosaur immediately, as something that violated the "world rules" of the game he thought he was playing. "To him dinosaurs were creatures that might have lived on some far off continent, they did not get ridden around like a horse" is not a statment about game rules, but world rules.
Reading the OP leaves me with a strong impression that this is a case where the DM violated the established rules of his world to avoid saying "No" to the new player. However, players rely upon the established rules of a game world to provide verisimiltude and to give them a basis upon which to make their decisions. Breaking world rules breaks suspension of disbelief.
The DM either wasn't clear about world rules that should have been obvious to the players, or he should have said "No" to the new player. Unless of course, he prefers this new player to the one who quit. In any event, it seems clear to me that the player who quit didn't have faith that the new character made sense within a larger context that he didn't have access to. And, again, this is a DM problem....or the player who quit is no great loss.
Anyone who'd quit a campaign over something like a dinosaur being introduced, has to have had other issues and other complaints. It's D&D, not "Three Musketeer's Roleplaying". It is not nor was it ever, supposed to be a technically accurate simulation of a specific era and/or location.
Remember D&D is the game that got it's start sticking creatures in 10x10 rooms with no source of food, right next door to other creatures that would kill them and both creatures would just sit in their rooms waiting for people to enter the dungeon and kill them. Dinosaurs "out of the blue" have NOTHING on that.