Alright, this one may put you Genesis fans to the test because the description is most likely inaccurate and vague. I'm 99% sure it was on the Sega Genesis/Mega Drive as that's all I played when I was little.

It was a shooter with a top-down view similar to the first few Grand Theft Auto games, set in some sort of office building and eventually a dock with a lot of cargo crates around. I think you were a cop. The only bits that I vaguely remember are the aforementioned dock (which I think was a ways into the game) and what must have been the beginning of the game, in which your character went down a hallway, exiting into some sort of lounge with two armed guards. There was also something to do with picking up body armor at this point.

That's about it, and like I said I can't guarantee this information is remotely accurate, so unless something jumps out at you, don't waste your time hunting it down. Been there, wasted at least a few hours so far.

Ughh... Kind of sounds like the http://en.wikipedia.org/wiki/Die_Hard_Trilogye for PS1?

No?

Uhmmm it also sounds like another game that was voiced by bruce willis http://en.wikipedia.org/wiki/Apocalypse_%28video_game%29

Those are the only 2 games I can think of that was in the view of the pre-GTA3 view and a level with some sort of office building...

I've also been going crazy trying to think of genesis games when I started this my http://www.gamesas.com/index.php?/topic/1191472-old-school-games/

It was a genesis game where you were some sort of monster, I don't remember how the combat was. I think you were some sort of monster or a mummy or something and when you completed each level there was a body part that was added to some weird Frankenstein type monster on the screen...

Possibly http://www.youtube.com/watch?v=sMTTD8SKESk?