Random Adventure Generator

Theme	Romance
	This sort of adventure (rarely played, but worthwhile anyway) has as its central plot the romance between two characters, usually a player-character and an NPC.
Goal	Settle a Debt
	A player character may find himself in the position of needing to settle a debt. He could gamble away all his money and need to raise some more to repay the gambling house before its enforcers come for him. On a more personal level, the character may need to settle a debt of either money or honor that he owes to an NPC.
Story Hook	Hero Offended
	Someone greatly offends the hero, so much so that he'll pursue his offender right into the adventure. (Note that this usually means that the offender is a minion of the Master Villain. You'll have to decide whether the minion offended the hero precisely to bring him into the adventure or just as a side-effect of his ordinary villain activities.)
Plot	Accumulation of Elements
	In this sort of plot, the heroes have to go from place to place -- perhaps covering very little area like a city, perhaps roaming the known world -- and accumulate elements to be used against the Master Villain. These elements may be clues, pieces of an artifact, evidence, or allies.
Climax	Prevented Deed
	Here, the heroes have been defeated -- captured by the Master Villain, or so thoroughly cut up by his minions that all believe them to be dead. And the heroes have learned, from the bragging of the villain, loose talk of his minions, or examination of clues, what is the crucial event of his master plan. In any case, the battered and bruised heroes must race to this site and have their final confrontation with the villain, bursting in on him and his minions just as the knife or final word or key is poised, and prevent the awful deed from taking place -- and, incidentally, defeat the master villain and minions who beat them previously.
General Setting	Under the Sea
	This sort of high-fantasy adventure takes place in and under (not on top of) the sea. The heroes require access to some sort of magic item or spell that allows them to breathe water for long stretches, and might adventure in the uncharted depths or perhaps in a community of sea-breathers.
Specific Setting I	Demi-human Community
	In wilderness areas, this will be a large community of demi-humans -- elves, dwarves, halflings, whatever -- or intelligent nonhumans such as orcs. If your action is taking place in a city, this could be a hidden community (such as a secret underground dwarf community) or a section of the city inhabited mostly by demi-humans.
Specific Setting II	Ruins
	These can be the ruins of some ancient civilization, an abandoned temple or castle, incomprehensible blocks of stone arranged by ancient gods, etc. They can be magical or normal, inhabited by normal animals or by monsters, centers of magic or just tumbled-down buildings.
Master Villain	Organizer
	This Master Villain is the head of the local criminal syndicate -- the Thieve's Guild or slaver ring, for instance. He's cold-hearted and unsympathetic, and human life means nothing to him. He employs assassins and musclemen against the heroes, and can only be reasoned with when it's going to profit him more to cooperate with the heroes than kill them.
Minor Villain I	Childhood Friend with a Dark Secret
	This Minor Villain is like the character of the same name from the Allies and Neutrals section. However, the heroes find out early on that he's really working for the Master Villain. He may not wish to be helping the villains; his family may be held hostage, or he may just be too frightened of the villain or otherwise weak-willed to refuse. Alternatively, he could actually be evil now.
Minor Villain II	Snivelling Vizier
	The Vizier is a throne-room villain. Functionally, he's rather like the Hard-Eyed Advisor, offering tactics and advice to his master; but he's an ooily, sleazy, cowardly sycophant. He's usually brilliant in his field of advice but has no combat abilities.
Ally/Neutral	Obsequious Merchant
	This fellow is the owner of the caravan the heroes are protecting, or the merchant the heroes encounter when they desperately need to buy something. He is oily, ever-flattering, overly agreeable, and is a sharp bargainer; the heroes will not find him willing to give them a sale price.
Monster Encounter	Loving Deceiver
	One of the player-characters, specifically one of the better-looking ones, attracts the attentions of a very attractive local of the opposite sex. This local person, encountered in unthreatening surroundings, invites the hero off to a liason away from his friends and other people. Of course, this person is a human-appearing monster of some sort; once alone with the character, he/she will attack the character with monstrous intent.
Character Encounter	Belligerent Soldier
	The billigerent one has just had his ears pinned back by his commanding officer and is anxious to take it out on some hapless civilian. If this is a city gate, he claims that the hero's papers are wrong or that he recognizes the hero from descriptions of a wanted criminal; if this is the streets, he insults the hero's lack of military bearing, pretty looks, clothes, smell, companion, or whatever it takes to provoke a reaction.
Deathtrap	Coliseum
	If it's appropriate, you can have the heroes captured by the local authorities -- particularly when they're in an exotic land, lost world, or whatever -- and have them armed with gladiatorial gear and dropped into a coliseum for the entertainment of the locals. (Note that this works much better with fighting-type heroes than spellcasters.)
Chase	Special Terrain
	You can make any chase more memorable by having it take place in a setting to which it is utterly unsuited. For instance, horse chases are fine and dramatic when they take place through the forest, out in the open plains, or along a road -- but they become diabolical when they take place inside the Royal Palace or in dangerous, labrynthine, treacherous catacombs.
Omen/Prophesy	Hero Fulfills Prophecy
	This is the most useful sort of prophecy. In the early part of the adventure, one of the heroes discovers that he fulfills some ancient prophecy.
Secret Weakness	Element
	The Master Villain can be banished, dispelled, killed, or otherwise defeated by some of element or item. The Master Villain tries to get rid of all the examples of this element in his vicinity; he doesn't let his minions carry it or bring it into his presence. But he's not stupid; he doesn't announce to the world what his weakness is. He tries to hide his concern within another command. If he's allergic to red roses, for instance, he orders all "things of beauty" destroyed within miles of his abode.
Special Condition	Time Limit
	Finally, the most obvious condition to place on an adventure is to give it a time limit. If the Master Villain is going to conclude his evil spell in only three days, and his citadel is three hard days' riding away, then the heroes are going to be on the go all throughout the adventure -- with little time to rest, plan, gather allies, or anything except get to where they're going.
Moral Quandry	Honor Quandry
	You want to use this on the character with the most strongly developed sense of personal honor -- someone who has lived all his life by a strict code. Toward the end of the adventure, this character realizes that the best way to defeat the Master Villain is a violation of that code. For instance, the character might be a paladin, who discovers that the only possible way for the heroes to defeat the Master Villain is to sneak up on him and stab him in the back.
Red Herring	Artifact that Doesn't Work
	Often, epic quests against powerful Master Villains require that the heroes find some legendary artifact, the only object which can defeat the villain. If your heroes have had no trouble getting to the artifact -- they've effortlessly sliced through every obstacle you've put in their path and are confidently advancing on the resting place of the magical item -- you can have it not work.
Cruel Trick	Wanted by the Law
	One final complication, one which occurs pretty frequently, is when the heroes are wanted by the law. When they're wanted by the law, they have to travel in secret and very limited in the resources they can acquire.

Based upon tables from the Dungeon Master's Design Kit by TSR, Inc.