Game developers used this to test unfinished software code.
The VCD port on the right hand side is a 'Virtual CD port' which enabled unfinished game code to be ran directly from a PC, thus testing it on actual Saturn hardware without the need to make a CD each time.
The Pioneer LaserActive is a converged device and fifth-generation game console capable of playing Laserdiscs, Compact Discs, console games, and LD-G karaoke discs.
It was released by Pioneer Corporation in 1993.
In addition to LaserActive games, separately sold add-on modules (called "PACs" by Pioneer) accepts Sega Mega Drive/Sega Genesis and PC Engine/TurboGrafx 16 ROM cartridges and CD-ROMs.