Final Fantasy VII/Shinra Headquarters

You'll find yourself on the playground. Barret will be pretty broken after Sector 7 is destroyed, but he'll be a bit hopeful as he learns that Marlene might be safe. So, after this cutscene, head toward Aerith's house - and Barret and Tifa will join Cloud.

Back at Aerith's house, you find out about the Cetra (Ancients), and who Aerith's mother really was. And Barret will meet up with Marlene.

Back to Wall Market
Barret will suggest that Wall Market might have something that might help us get to the Shinra headquarters. So head there.

It's a good chance to stock up with all sorts of stuff. The people will discuss about how the neighboring sector went crash, the porridge is all ruined, and how all sorts of stuff rained down - and that damn weapon shop man grabbed them all!

The weapon store man - the one who's constantly fixing up the tank, not the clerk - tells you that you need batteries to get up to the plate. Umm... okay. Buy them, they're not that expensive.

I really recommend that you should stock up on Lightning materia, have at least 3, one for each party member at time. You are, of course, heading to a highly technical place next; highly technical means "doesn't like power surges".

The long climb
As you pass the Corneo's mansion, a bunch of kids will tell you of something cool, like, a cable that just happens to hang all the way from up and lets you climb the sector wall and to the levels above.

After you get up, the place is again fairly straightforward: The yellow sockets need batteries inserted in them. These let you advance.

The single most frustraing minigame in the entirety of the game is right here too. It involves leaping to the other side by using the swinging bar. Timing is really important. The best way to proceed is to pick some static spot of the background, and hit the button as the bar is at that point, and try earlier. To me, it seemed like coinciding with some puffs of smoke on the background. The point is, the right moment is when the bar is swinging towards Cloud, and pretty close to him, but not quite there.

Have fun storming the castle!
You can save at the front entrance of the Shinra building. Tifa begs you to sneak in. The first part of getting in is to head left, and use the side entrance door. Now begins the fun, long and dull part of the game - you need to climb all the way up to the 59th floor! Listen to fun comments from Tifa and Barret and an grab a bottle along the way.