Here we have a DVD based party system from Zap-it games. The games are desgined to be played by more than one person, in fact the console comes with four remote controls right out of the box. Games tend to be trivia and puzzle orientated.
4 degrees vol 1 (Trivia)
4 degrees vol 2 (Trivia)
4 degrees Bible (Trivia)
Rewind 2006 (Trivia)
Rewind 2007 (Trivia)
Lock 5 (puzzle game)
Zap 21 (Blackjack & card games)
Letter Zap (Letter game)
Click! (Hangman/Wheel of Fortune type)
Not exactly a hardcore game system, but it might be something you could enjoy with the old folks on Thanksgiving or something. Retails for $99 online or at major toy/department stores.
Zapit Games official site