You have Omnisphere. You have Kontakt. Why use this? Speed and Character.
The v192.13 bank is organized into four core color-coded modules:
The secret sauce? The "Box" module. It contains the Ultimate Sound Bank of "useless but perfect" sounds—like the Fantasia patch or the Tine Piano that every MPC head has been sampling for a decade.
For users attempting to run "Plugsound Box v1.9.2" today:
If you are scoring a game inspired by PS1 or N64 aesthetics, this is your holy grail. The resonant filter in PlugSound Box doesn't sound like Moog; it sounds like a low-budget 1997 studio rack unit. That is exactly the sound you want.
Forget modern orchestral libraries. PlugSound Box gives you close-miked acoustic guitars, breathy flutes, and accordions. These sound "fake" in a pristine mix, but in a lo-fi or indie context, they are absolute magic.
A massive warning to collectors: The internet is flooded with "PlugSound Box v192.13" downloads that are actually cracked versions of SampleTank 2 or fake SoundFonts.
How to verify authenticity:
Legally speaking: The company Zero-G (who purchased Ultimate Sound Bank's assets) still sells the "PlugSound" legacy pack on their website, but it is the neutered v2.5 version. The v192.13 version is technically abandonware, but downloading it falls into a grey area. If you love the sounds, support the legacy by buying the modern Zero-G bundles.