It's not metagaing knowledge to say, "We're inexperienced adventurers with limited martial skill and none of the truly potent magical spells, so we don't have a chance against the dragon.".
No, it's not. But that's not what you said. You said, "First level PCs should really not go anywhere near a blue dragon or a town filled with bad guys." That's metagaming.
Inexperienced adventurers not engaging in a straight-up fight with a dragon is not the problem. Inexperienced adventurers totally throwing in the towel and not doing anything because there's a dragon overhead and first level characters don't have the hitpoints to withstand its breath weapon, yeah, that strikes me as metagaming.
Just like in the real world, people in this world would grow up with stories about the toughest predators around. People who grow up in some parts of the world know exactly how dangerous a lion is or a poisonous snake or whatever. Just like in the real world, inexperienced fighters would know about the skill set of and stories about experienced fighters.
Are you claiming that you play a game of Dungeons and Dragons, and the PCs are not expected to know that Dragons are practically the epitome of monsters?
As I've said repeatedly, PCs are not expected to want to fight a dragon head on, but neither are they expected to completely avoid danger. Nor are they expected to think "dragon = impossible to defeat".
Now this sounds like a contradiction.
Because the authors wrote that it is expected to NOT attack the dragon in one module and TO attack the dragon in another module, the players are supposed to somehow know which to do in each case.
Say what?
That really sounds like metagaming knowledge.
No contradiction. Neither module expects the PCs to fight the dragons toe-to-toe and defeat them by killing them. Both provide opportunities for the PCs to attack indirectly and drive the dragons off by doing a certain amount of damage.
Neither module expects the players to "know what to do". They give them a problem and expect them to figure out a way to solve it.
And actually, I think you are misremembering. There is nothing on page 32/33 about the PCs not being expected to attack the green dragon. There is only a blurb on him running away at half hit points. There is also a PC background expectation where the one PC is encouraged to attack the dragon. And on page 32, Reidoth specifically asks the PCs to drive off the dragon. On page 31, he warns the PCs of all of the threats in the ruined town (not just the dragon) and suggests that they leave before they get killed.
The module does not encourage the players to "attack" the dragon. It consistently says, "chase off" and "drive off", with one instance of "slay or drive off" in the Folk Hero's Personal Goal (which is entitled "Drive Off the Dragon"). The module includes one way this can be accomplished (reduce to half hit points). It also includes Cultists who just happen to want to recruit the dragon to their cause. Nor does it suggest that the dragon attacks on sight, and it speaks Common, so negotiation is on the table.
The module encourages the PCs to attack the dragon which is basically suicidal because a single breath weapon should either kill or knock out most third level PCs in round one. Does it really make sense for the dragon to not use his breath weapon in a fight?
Does it really make sense for PCs to approach the dragon so that they get hit full on with a breath weapon right off the bat? I mean, it's not exactly like they stumble across it without meaning to. Reidoth tells them about it and the Folk Hero knows where it is. Why are the PCs making a suicidal frontal charge, instead of planning ahead, approaching stealthily, and laying traps for the dragon? Or any number of possible strategies?
In both of these modules, the PCs are expected to attack the dragon. In the first module, the game designers attempt to mitigate the number of TPKs at gaming tables by having the dragon run away, regardless of whether that makes sense. For example, say that there is one PC left standing and the dragon gets to half hit points, why wouldn't he just finish off the last PC? That way, he doesn't have to give up his lair and his treasure (and might gain treasure from the dead PCs).
Maybe he does. Maybe he runs anyway for any number of reasons (maybe without even fighting the PCs!). There's nothing hard coded here. The module provides some characterization, that's it.
In the second module, the dragon is not really supposed to attack the PCs (especially with his breath weapon). But the dragon has no qualms about attacking NPCs. Does that really sound logical? No. It's a plot point that is written in one specific way so that a specific thing does not happen (i.e. the PCs dying).
The dragon isn't attacking PCs or NPCs. It's the Dante Hicks of dragons. It's simply strafing the tower with lightning. It doesn't know PCs from NPCs. Why would it suddenly pick out the specific characters from the dozens of men firing arrows at it? The encounter is set up like a skill challenge (prevent 10 soldiers from dying), but that doesn't mean the characters or the DM can't change the stakes.
Your entire premise about it being ok to attack a dragon is based on the fact that you know that the author of the module in both cases tries to mitigate a TPK.
No, my entire premise about it being ok to attack the dragon is based on the fact that I expect the
players to mitigate a TPK.
PCs shouldn't know this, but they should know that they don't really stand a chance against a dragon.
They don't know jack until they try.
But you are justifying your POV by claiming that PCs should not know that Dragons are one of the deadliest threats known to a campaign world society.
Hey, something I never said! Would you mind cutting that crap out?
Yes, because PCs should get XP for knowing that the dragon will kill off the NPCs, and hence, yelling for them to get off the roof. If the PCs know that the dragon is super deadly here in this skill challenge, how come they do not know that he is super deadly before even entering the town?
See, there you go again. Did I ever say PCs didn't know dragon's were deadly? No. So what did I say? I'll quote it for you.
Characters don't know that they are first level. They don't even know that they can't fight a dragon, or drive it off. Sure, it's dangerous, but people seeking adventure put themselves in danger all the time. Firefighters, police officers, soldiers, skydivers, etc. The 0-level militia men defending the village aren't taking into account their ability within the game to fight a dragon or an invading force.
A character may certainly understand that dragons are big and bad, and do everything they can to avoid having to go toe-to-toe with them. That doesn't mean they decide to do nothing when a town is being attacked by a dragon. They can treat the dragon like a natural disaster, and simply try to save as many regular folks as they can. They can try to find a way to drive the dragon off without engaging it directly. They can look for force equalizers.
Every adventure involves adventurers walking into situations that normal people avoid if they can. A dragon attacking a town is no different. How the characters respond to that is entirely up to them. Dragon over town != PCs must fight dragon to the death. They can go with no intention to fight the dragon, but just to help people. They can go because they see humanoid bad guys who are more their size. They can go because being in some kind of shelter is safer from a dragon on the wing than being out on the open road. They can go because, hey, a dragon attacking a town is a good chance to do some looting of their own! And heck, they can go just because they're adventurers and there's adventure in that thar town.
So does the idea of going into a burning building. Nevertheless, people do it. And generally they do it in a way to mitigate the danger. And not just firefighters, either.
Please argue with what I say, not what you want me to be saying, or we can end the discussion right here.
And wait a second. It's doing this with a breath weapon? And soldiers are only getting injured?
Why doesn't one of those super soldiers go take on the half dragon?
Because abstracted combat is a useful tool in encounter design.