Beat up the soldiers here (a Shockwave in the middle of them is highly recommended due to their numbers) and head up. You'll meet a shock bot and a laser bot. Destroy the door on the north wall for relics and continue up. You will meet up with two sword soldiers. Take them out and continue to another laser bot and missile guard. After them you'll see a room with a spinning laser. Destroy the bot in here and continue to the left. There is another beam and bot to destroy. Do so and continue on (ignore the door on the right for now) to see a scene.
Stealth is back! Cool! You can go back if you wish to the previous door we skipped, but there's just sunstone back there. Continue on and destroy the bots in the room (stealth not needed) and continue on using stealth when you have to. When you reach the missile guard and bots become big and wipe them out. There are some relics in the left boarded up door.
Get small and head through the vent on the right. Follow the path outside to some bots. Out here become big and take them down (one hit deaths on stealth knack are no fun) then continue on to the north and watch the scene.
You're still outside now, but stay in big mode and head forward defeating enemies. Mind the wind, especially when you have to walk around a bunch of fans to continue. After the fans destroy the guards you find (watch out for missiles) and *before* continuing on punch the door frame / area on the left wall down where the sword guards were for:
HIDDEN CHEST #51:
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After crossing the fans outside and defeating the enemies, go punch the left wall where the door frame (or outline) is and you will find this hidden room.
Head forward to the elevator and continue. Once you get off grab the relics in the north room and meet a new enemey. These electricity bots will make a spark travel in a line at you. You can jump over them easily enough and smack them. Further in go stealth and kill the guard at the end. Continue on and fight the ninja bots (the spear throws need dodged and they can also throw them at the ground) and after them you'll see a scene.
Kill the two guards that show up and head onward. The next room has lasers in it with a button on the left you can hit in stealth mode to turn them off (you can turn it off before fighting in you wish). The room to the north has a button as well. Head to the left and deal with the foes, then continue on (nab the relics) and head through the vent.
Fight the enemies in the next room (some dozer bots - haven't seen those in awhile) and continue on for a scene. Around the corner are two bots and a missile guard (take out the guard first). Go stealth and get past the lasers then go big and take the guard out. Continue on and destroy the shooting robots you see and continue past some lasers and hit the button for a scene.
Yikes, they nearly got us! Continue to the left to start the next part of the chapter.
It won't let me go into stealth mode.