What if you take a traditional campaign (4PC, 1DM) and what if one were to setup this campaign with a high likelihood of PC death right from first level onward. On a regular basis. Not as an accident. But as a feature part of the campaign. And the PCs are aware of this. Nothing is a surprise and everyone agrees to this being the case. Everyone likes the idea of a deadly game. My groups usual games go from low levels to high with maybe one or two PC deaths and these deaths become significant plot points.
A lot of OSR games are like this, although since this is being asked in the 3.X section, I recommend checking out Frog God Games' catalog of adventures for inspiration.
What kinds of things would you recommend to facilitate such a campaign? How do you keep the plot going in such a game?
Basically do not coordinate encounters and the setting to their level. Give hints that certain areas might be really dangerous (signs of a huge dragon flying over a volcanic mountain range, a lake full of sharks) instead of plopping an archfiend in the middle of nowhere with zero forewarning.
Make it non-linear, or a plot not dependent on the PCs being the same group of people. Take for instance Way of the Wicked Adventure Path, which is facilitated on the PCs being more or less the same ones who joined Cardinal Thorn's cause in the first adventure.
Take the Sword of Air. Nothing in it requires that the party even be comprised of the same PCs, and a lot of locations are unconnected from each other to the point that they're relatively self-contained.
Sandbox styles of games are great for this.
This Reddit thread does a good job of talking about it.
Should the PCs each have multiple characters worked up? How do you deal with PCs dying during the gaming session but wanting to keep playing that night? Any cool or interesting ideas or concerns about setting something like this up?
Yes, have multiple PC stat blocks planned out. As soon as a PC dies, you want to get them playing ASAP. Maybe not by a new PC immediately; maybe they take control of an eidolon or animal companion, or hireling already with the party. New PCs can be found as prisoners in the dungeon, friends and allies from the same organization such as a knightly order, or otherwise another person with an incentive to work with the party.
Cheers,
Necro
Have fun!