You've played A-10 Attack. You've played Microsoft Flight Simulator. You've played Star Wars Galaxies. If those games didn't satisfy your thirst for open-world expansiveness, now's your chance to play the literal, actual universe:

The Uchuu simulation is the largest and most detailed simulation of the Universe ever made. It contains 2.1 trillion 'particles' in a space 9.6 billion light-years across. The simulation models the evolution of the Universe across more than 13 billion years. It doesn't focus on the formation of stars and planets but instead looks at the behavior of dark matter within an expanding Universe.

The detail of Uchuu is high enough that the team can identify everything from galaxy clusters to the dark matter halos of individual galaxies. Since dark matter makes up most of the matter in the Universe, it is the main driver of galaxy formation and clustering.

The team "used over 40,000 computer cores and 20 million computer hours to generate their simulation, and it produced more than 3 Petabytes of data." In laymen's terms, "3 Petabytes of data" translates roughly to "an unfathomable metric butt-load of data."

But don't worry! The team was able to pare that unthinkable amount of information down to a mere 100 terabytes of information, which is much more within the grasp of mere mortals like us:

[T]he Exadrive from Nimbus is a 100 TB solid-state drive in a standard 3.5-inch form factor. Granted, it will set you back US$40,000, but if you have that kind of change hiding between your couch cushions, why not use it to keep a universe in your pocket.

It definitely sounds a bit more interesting than yet another round of Star Trek Online!