Stack'em gave credit for 20 pink pigs even though I lost the game. (I lost on purpose to see if it would, and it did.)
That's so funny, I did the same thing in Stack'Em this morning.
Off the top of my head:
TriPeaks Solitaire: Don't need to win to get peak credit.
Mahjong Safari: a recent challenge of getting STAR tiles didn't require me to win when I hit an impasse in the game.
Canasta: win is not necessary but getting to the end of the hand usually is.
Peggle Blast: If you don't win the level, you'll still get credit for orange pegs/purple pegs.