http://www.youtube.com/watch?v=hD8Esq_TZvU

tip to beat robocop:

Don't look at the targets LOOK AT YOUR GAUGES.
Why you would ask. Well... the gun of Robocop isn't a single shot
gun, it is a fully automatic machine gun with unlimitted ammo!
That's a lethal combination which we can really use.

Aim your crosshair to the center of the screen at shoulder height of the bad guy.
Then continuously press the trigger, the bad guy will walk into your gun
and the score will increase, when the hostage is hit, release the triger immediately!
When the hostage is out of range repeat the process, the bad guy will take
hits until a score of 4500 has been reached.