Bill and Zoey from Left 4 Dead.
Nick and Ellis from Left 4 Dead 2.
Chell from Portal.
Link, Zelda, Tetra and Vaati (Minish Form) from LoZ.
Ness, Poo, Paula, Picky, Porky, Tony, Jeff and Duster from Mother 2 and 3.
Blue, Aaron, Lucian, Wallace, Steven, Thorton, Volkner, Riley, Roark and Byron from Pokemon Games.
And I haven't gotten halfway down the list xD