CATO NEIMOIDIA: The Tarko-se Arena - Star Was: The Force Unleashed 2
HOLOCRON - Experience & Corrosion saber crystal
You need to get both of these Holocrons before taking the elevator all the way up. Get on the elevator BUT jump off at the top right ledge. Get Holocron one, then jump out the top right and dash into the lower area and get the second Holocron.
CATO NEIMOIDIA: Tarko-se Arena Collectibles
The Gorog first attack will be a sweeping motion so double jump dash over. This is followed by a fist slam that you need to dash out of the way of. Now is the time to strike. Lightning and Saber Throws are good here. Whichever you have ranked up the most. Look for a shadow on the ground, this is where the hand will come down next so be somewhere else.
Keep up the dodging and attacking until the Gorog roars at you. You can saber block this and then keep dodging until he slams his hand down again. Lightning the hand until the shackles take enough head to magnetize. The Force Push the hand into place.
Repeat for the other hand.
With both hands locked in place Lightning and Saber Throw its face and then Force Grip its head straight down. He'll rip his hand free and you'll have to go through the entire process AGAIN. At the end of this section you'll get a button sequence to “end” the battle.
Unfortunately the Gorog apparently doesn't use its brain for much. Now we go to a series of towers that you need to have the Gorog smash. Just keep up with the Lightning and dodge the swipes and until he smashes the tower. Head around the back and climb to the top. The Gorog will grab the top and smash with his left hand. Just keep up the pressure and he'll rip the tower off.
Now repeat for a second tower. Afterwards jump from destroyed tower to the next until you get to the Baron.
Now we have a falling sequence. Use Force Push to break up objects as they come at you. When you have a clear lane use a charged Dash to close in on the Gorog. Hit him with attacks and Lightning until he falls away. Again, repeat a few times. After this the battle is finally over.