Lanefan
Victoria Rules
And 3 more characters waiting in the wings for when the first one dies. This is brilliant! (well, brilliant until you realize you're DMing a 32-member party for the first proto-adventure; that might be a bit daunting, I wish you well with it)The idea:
Players will each get to pick a set of 4 townspeople, each set is of people is based of a single character class. For example Bob picks Cleric and gets 4 premade minions, Aurora the local high priest, Ben the priest, John the monk, Will the altar boy.
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When the rebellion is over each player will get to pick 1 of his/hers 4 minions to become a PC and hopefully by then the players will have a fleshed out lvl 1 character.

My last two long campaigns have started as follows:
- A famous old adventuring Company, not heard from in ages, is holding an open recruitment meeting. The rookie PCs for whatever reason (determined ahead of time by you and the player) each attend the meeting; and the actual campaign begins at the meeting's start. There's lots more aspiring adventurers there; the recruiting Company throws a few out as undesireable, divides the rest up into parties (with all the PCs in the same one, obviously), gives each group a mission, and sends them out into the field. When I used this, the whole thing was a sham to kill off aspiring adventurers before they developed into anything, and most of the missions were pretty much assisted suicide...except the PCs' one, which was a more ordinary adventure though not at all what they'd been led to expect by their recruiters.
- A Bard roams the country hailing the virtues of his friend and companion Cavalier, and brags about all the Orcs this brave Knight is going to kill in the mountains. Each for his-her own reasons, various other PCs accrete to these two as they roam the countryside; and all eventually wind up in said mountains where adventure awaits...
Lan-"starting a campaign's the easy part; keeping it going after ten years, not so much"-efan