Secret Building in Death Stranding

You have to play until Sam goes to incinerate BB.

Have regrets about Incinerating BB.

To get to the next area.

You will need to fly jump to Knot city warehouse.

Remember to save.

You have to explore the upper deck of the warehouse.

Press L1 to show the incinerate marker.

After that, fly jump towards marker direction.

And land to the left of T building below.

Always remember to save!

Now you will need to walk down and fly jump left.

Follow direction to get lower.

And then fly jump to even lower platform.

After that, go to the lowest area here.

It is the spot, save!

Fly jump left onto T building.

Everything dark, check BB.

Next, you have to press R1 to Illuminate T building.

Fall off near the center of T building.

And swim towards the short end of T.

Lou's mother's room!

Cliff took care of Lisa bridges here.

You have to follow the path cliff took to escape.

Cliff got shot near here.

Explore a long curved corridor.

Now for the under building view.

Then you need to go back to the room of Lou's mother.