Portal and Portal 2 are both games made by Valve. You, Chell, are trying to finish the test chambers that the human-robot, GLaDOS, is making using the Portal Gun. Though the games require Steam, it is very fun, and I highly suggest it! :)
Here
is a picture I found on Google Images.)
Portal 2 Co-Op Trailer:
Related Links
Steam
Website by Banditron | Click
here
to go to Banditron's YouTube Channel
