[riizade]

Can you elaborate on Unity wasting disk space on gigabytes of zeroes?

How did you discover that? Is it intentional on Unity's part? Percentage-wise, are we talking 2% of a 100GB game, or 50% of a 4GB game?

I can't find anything about it online.

[Grom_PE]

I suppose that is an issue how a specific game was made, not inherent to Unity.

I like to look inside game files and a .zip archive of 1GB unpacking to ~10GB game made me suspicious.

[marcosdumay]

My first guess would be it has lots of uncompressed images or badly compressed videos as artifacts.