Lore
Opera Performances
The Opera Hall will stage any quest you have lived through, finished or failed. It will not let you rewrite it.
A performance replays a tale you have already lived: a decision you can try differently, a fight you can try again.
Nothing is kept. Experience, loot, karma and every change you make during a performance are returned to what they were. The audience reacts to your acting. The world you return to is the one you left.
In a game that takes your choices seriously, the Opera Hall is an argument that some choices are only ever made once.
In co-op a performance belongs to the performer alone. The rest of the world carries on, nothing is rolled back, and whatever the performer gained on stage is taken back when the curtain falls.