I've been working on this off and on for the past couple of months.
The Backstory table is here.
The basic idea is that every time you level up, you roll 1d100 on the Backstory table.
Each has a hopefully-inspirational fragment of backstory and two potential outcomes.
So if you roll a 1, the DM tells you "You got into a confrontation with a bully who was way tougher than you. Did you fight or flee?"
Now the trick here is that the other players at the table decide what your character must have done, based on how your character's been acting in the game thus far. Debate is allowed and encouraged, as is swapping examples of supporting evidence, in this case probably times you stood and fought versus times you turned and ran.
The others come to an agreement or vote or whatever, then you make up a story of what actually happened. Who was the bully? Why did you do what you did?
The story can be as detailed or as sparse as you want, no pressure. Most of my players tied it into their failed career in some way.
Finally you get told what your new ability is! Each outcome of each backstory has its own associated power. In this example, "fight" nets you a +1 to hit vs enemies who have more HD than you, and "flee" grants you a +1 to fleeing rolls.
Score! Now your character is hopefully encouraged to live up to their new backstory.
|An old one but there aren't really any better images when you search for "backstory"|
This was all, as with damn near everything I ever make these days, chiefly inspired by Arnold K.
Specifically, his lifepath character generation thing.
It's a fairly involved process but at the end of it you have a character who's fleshed out in a way that Bob the Level 1 Fighter isn't.
Trouble is, I love quick char gen with an embarrassingly fiery passion. It's quick to get to the actual playing-the-game part of the game, I can get new players playing quickly, and I don't have to feel too guilty if a PC dies. It's the best.
But another thing is that I already have some light character history at char gen via the failed career table. After their character's finished I ask the question that goes like "So you're a Necromancer who used to be a Bellringer. How'd that happen?" and have actually always received a good answer. The implication's meant to be that before that point they were a boring nobody, at which point they went off to become a Player Character and their life gets Interesting and their character's actual in-game experiences become their backstory.