Firstly, ignore the 3158.dsk.bin, as it is 100% incomplete and corrupt!

The disk image named 3158.dsk is an 800k ProDOS boot disk that contains
the Prosel application launcher with the following Apple II games: 

2400 AD
Ultima 1
ORGE
Strategic Conquest

SoftDOCS for all are also on the disk.

Apple II Foever!
The 202 Alliance