::'''Jay Wilson:''' We had a lot of them in our BlizzCon build". [In one of them, there was] a series of ghosts at an altar who were seeking an object that you'd get to prove your worth. If you did get it, then they would test you by having big powerful monsters attack you -- and if you passed, you got a nice reward. Another one was coming across some fellow adventurers stranded in a dungeon who'd need your help to get out. So there are a lot of different kinds of scenarios; you'd run into people who would need to be escorted or a caravan that's been stranded. And if you stick around and protect [the caravan] for a few minutes from [an attack] that would occur, you'd get a reward. Most of these are fairly optional, where the player can decide whether he wants to do them or not, but we try to reward them well and make them pretty fun. The biggest goal we have with these is that we want to change what the player is doing. Whenever you can basically take the core game and make the player play it in a slightly different way, it makes the game a lot more interesting and keeps it from being tedious. You go from "I'm killing monsters aimlessly" to "I'm now killing monsters to protect this thing." That's easily a more interesting scenario, because it's different than what you were doing, and that's our main goal with that.

Jay also disclosed that the adventures (or events) are pre-scripted and written just for that area of the dungeon. Basically, the D3 Team writes, say, 15 possible mini-quests/adventures/events for a dungeon area, of which maybe 6 or 8 only a few will appear spawn in any given game. This makes the content semi-random; players will see different events in an area each time they play it, and will need to play a given area many times to see every possible event in it. And since the team can add in more such events during patches, the content can be perpetually refreshed. It's also possible that rare events might be incorporated; ones that would only spawn ever few hundred games, making it possible for players to get surprises months or even years after the game's release.