Valve releases “Portal 2″ E3 demo video

This week, Valve is giving you a look at the demo they let people play at E3.

Only thing is, you don’t actually get to play it, and it’s being released in seven parts.

But hey, a video will suffice, right? (If you’d prefer words about a video instead, our previous E3 demo coverage is here.)

In today’s installment, you meet Wheatley, a personality sphere who just happens to be one of the game’s new characters.