Portal - been playing for a few days now.  Really enjoying it -
especially all the funny quotes.

"Please note, we have added a consequence for failure. Any
contact with the chamber floor will result in an unsatisfactory
mark on your official testing record, followed by death. Good
luck."

"Uh oh. Somebody cut the cake. I told them to wait for you, but
they cut it anyway. There is still some left, though, if you
hurry back."

"Remember when the platform was sliding into the fire pit and I
said 'Goodbye' and you were like (deep male voice) 'NO WAY!'
(normal voice) and then I was all 'We pretended we were going to
murder you'? That was great!"