Black Mesa is a rival science company to Aperture Science. They were originally seen on Half-Life 1 for the ps2 and pc that caused dimenstional shifts bringing an alien race to Earth who enslaved all humans due to a "resonance cascade" that occured due to an experiment involving the Anti-Mass Spectrometer. The only reference to black mesa in portal is in the end credits song where GLaDOS makes a joke that Black Mesa can help Chell. The unexplained punch line is that black mesa was destroyed at the end of half life
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It doesn't have one. However, it is a remake of the first Half-Life, which had an M-rating so it's safe to say that Black Mesa should have an M rating.
I assume you are talking about Skylanders. The game comes with instructions that tell you how, but I will tell you anyway. Once you have the batteries put into the portal, unplug the USB from the portal and put it into the back of your game system. Then press the little black button on the inside of the portal and the black button on the USB. Next, screw the battery compartment shut and press the power button on the outside of the portal. You may need to press and hold, but the LED lights on the portal will flash and turn on and you can now start the game.
commercial portal is a portal of commercials ....
you go in peach's portal in the front of the castle and the 2d black box
You use the same portal you used originally - it is at Samael's prison at the Scalding Gallows.