Joshua Randall
Legend
D&D could easily adapt the Judge Dredd style of play noted above. We already have "scaling the adventure" sidebars for parties of different levels -- but what we really need are "scaling the encounter" notes for parties of different sizes (i.e., number of characters).
For example, if the party has 4 PCs, they face 6 kobolds. But maybe with only 2 PCs, they face only 4 kobolds. And maybe with 7 PCs, they face 12 kobolds.
Obviously you would need to do some number crunching up front to balance the encounters for parties of various sizes, but the back end benefit would be that you could run the same adventure regardless of how many players show up.
It would also be good to have a plausible in-game reason why PCs come and go frequently. An urban campaign would work well (again, borrowing the Judge Dredd idea), as would a planar campaign. Your standard wilderness/dungeon campaign would be a bit tougher to justify, but as long as the players are willing to suspend their disbelief, I think a clever DM could hand-wave the explanations.
For example,
DM: Last time, Tordek, Mialee, Jozan, and Lidda had just defeated the orc chieftain and were ready to explore the secret passageway behind his throne.
[Today there are only 2 players.]
DM: Jozan and Lidda [whose players are not there] decide to wait in the throneroom to make sure no wandering orc patrols suprise the party, while Tordek and Mialee [whose players are there] press onwards.
For example, if the party has 4 PCs, they face 6 kobolds. But maybe with only 2 PCs, they face only 4 kobolds. And maybe with 7 PCs, they face 12 kobolds.
Obviously you would need to do some number crunching up front to balance the encounters for parties of various sizes, but the back end benefit would be that you could run the same adventure regardless of how many players show up.
It would also be good to have a plausible in-game reason why PCs come and go frequently. An urban campaign would work well (again, borrowing the Judge Dredd idea), as would a planar campaign. Your standard wilderness/dungeon campaign would be a bit tougher to justify, but as long as the players are willing to suspend their disbelief, I think a clever DM could hand-wave the explanations.
For example,
DM: Last time, Tordek, Mialee, Jozan, and Lidda had just defeated the orc chieftain and were ready to explore the secret passageway behind his throne.
[Today there are only 2 players.]
DM: Jozan and Lidda [whose players are not there] decide to wait in the throneroom to make sure no wandering orc patrols suprise the party, while Tordek and Mialee [whose players are there] press onwards.