This is the PC port of the SEGA arcade classic by the same name.  Basically you play the role of a police man out to shoot the bad guys - and hopefully not hit their hostages.  It's kind of that simple.  The computer glides you through a predetermined path - and all you get to decide is where you shoot your gun, and when you reload.  Having said that - the graphics are great and this game really sucks you in:

Virtua Squad under Virtual PC   Virtua Squad under Virtual PC   Virtua Squad under Virtual PC

Virtua Squad runs great under Virtual PC, however you will need to disable mouse  integration in order to play this correctly.

Cheers,
Ben