

He also looked to the mechanics of Eurogames like Puerto Rico for inspiration of how to represent complex mechanisms simply. The third edition of Twilight Imperium, published in 2004, was designed at roughly the same time that Petersen was also working on A Game of Thrones, and his desire was to emphasize similar narrative development in this new edition's gameplay.

It also introduced plastic spaceship pieces, replacing cardboard tokens that were used in the first edition. It was the first edition of the game to feature art by Scott Schomburg and Brian Schomburg. The second edition of Twilight Imperium was published in 2000.

Fantasy Flight set up demos of the game in a high-traffic corridor to garner more attention, and ended up selling out of all of their available copies in under two days.

The final version of the first edition debuted at the Origins Game Fair in 1997. Drawing from a background of working at a Danish game importer, Petersen designed, published, and assembled the first edition of the game single-handedly. Petersen while working as an importer of European comics. The first edition of Twilight Imperium was conceived by Christian T. Players assume the roles of rising empires on the fringes of the galaxy, vying for military and political control, until one finally becomes sufficiently dominant to take over as a new galactic emperor. The old galactic central capital, Mecatol Rex, located in the center of the map is maintained by custodians who maintain the imperial libraries and oversee the meetings of the galactic council. It is set in the unstable power vacuum left after the centuries-long decline and collapse of the previously dominant Lazax race. The game's premise is a large-scale space opera.
