>>96102431Set up the map and major characters. There is some relatively straightforward threat (the plague thing in Signalis), in a relatively straightforward environment (mining colony full of EMs). They are all there looking for a single person, shared between them. Structurally/mechanically, it is a dungeon delve, with a number of NPCs.
Run it with the same cast over and over. Each loop, roll 6d6; doubles mean:
1. A major character is at least partially aware of the loop, and blames the PC(s), and takes appropriate action;
2. The PC(s) are actually different people, in the fork sense, so what they did last time still matters and their corpses are where they died;
3. Rearrange the map, moving items into locations that don't make sense, and changing which room leads to each other room in ways that don't make sense;
4. Every room is now (flesh walls/covered in black mold/damp with ankle-high blood/otherwise completely fucked);
5. Flashbacks occur, but half of them happened to someone else, with no internal indication as to which;
6. Wild card: players roll up new PCs, or seemingly-identical versions of their PCs are elsewhere on the map (never let them be cornered/encountered), or they rotate character sheets between them, or their "precious person" is now someone else.
There is no escape or salvation. They can't even save the person they're there for; if they find her, give them one brief scene before restarting the loop. Stop running when you get bored.