Some set a story in a universe with a different history from our own.

They also appear to be set in a similar universe.

The second volume is set partly in the universe we know.

Most of the story is set in the parallel universe affected by this history.

The stories are set in the universe of her series about The Company.

None of these are set in the same universe as the Vega tales.

Leiber's short story "Try and change the past", also from 1958, is set in the same universe.

Warhammer is just one of many games set in a fictional universe.

While set in the same universe as the previous game, it will feature an entirely new cast of characters and time setting.

The Martians (1999) is a collection of short stories set in the same fictional universe.