GLaDOS is the funniest character in games and she spends the whole time calling you fat and stupid.
Fun fact: Began development as a prequel called "F-STOP" that had no portals at all.
Three blokes in Adelaide made a game bigger than most AAA studios manage with a hundred times the budget.
Fun fact: Made by a three-person team in Adelaide who funded it with a $57,000 Kickstarter campaign.