A "highly compressed" version is a repacked edition of the game that has been significantly reduced in file size (typically from ) for quicker downloads and less storage usage.
To understand the value of a compressed version, you first need to look at the original. Officially, Serious Sam 4 requires approximately of free hard drive space. Why so large? serious sam 4 highly compressed
Serious Sam 4: Big Chaos in a Small Package Serious Sam 4 is a high-octane prequel to the classic first-person shooter series, delivering the signature chaotic, over-the-top action that fans have come to expect. Released in 2020 by Croteam and Devolver Digital , the game pits Sam "Serious" Stone against massive hordes of alien invaders. A "highly compressed" version is a repacked edition