Valve's Portal-inspired blue screen of death, which popped up during Gabe Newell's GDC Awards speech last night, had a hidden message.
From that we can deduce that Portal 2 will be shown at this summer's E3 in some form, which takes place 15th-17th June.
Gabe Newell was honoured at the GDC Awards with a Pioneer Award for his work with Valve.
Portal 2, revealed last week, will be out this "holiday" on PC, Mac and Xbox 360. There will be a separate two-player co-op campaign and new gameplay feature physics-changing paint.