Back in the day, developers had their signature start ups to games. What were some of your favorite? For me: Konami:
SEGA!
989.. their games generally sucked, but Iiked the intro http://www.youtube.com/watch?v=_FbeH49Aheg
Midway
Lucasart
Lastly... not a studio really... but the most bad ass opening ever ULTRA 64