Ok after getting through all 3 levels of the TGM complex shooting down a military bot and killing everyone that moved.

I still can't get through the gate to tokyo station, the one near the futuristic doors to TGM with the 2 MJ12 troopers, both door strength and lock strength are infinite.

HOW DO I OPEN THESE DOORS?

(it may not be tokyo station, but its near the futuristic TGM doors with the two MJ12 guards and, oddly enough, a NSF guy with a GEP gun on the roof.)

you don't go into tokyo station or TMG HQ, at least not yet. instead you have to go underground...

thanks
Anything else to add to that?

How do I get underground, I'm looking for walkthroughs not "hints and tips", you see. :)

look for a hatch on the floor.

i know where it is, but if i told you, it would be too easy.

I could be wrong, but the hatch I think the hatch is near the stairs with the escalator-like things. Someone correct me if I'm wrong.