The Backyard Football series has been around now for over 10 years, with roots on the PC.  It has a long history of family friendly style football perfect for kids combined with real NFL players and teams.  Madden NFL 10 may have added an online co-op mode this year, but Backyard Football didn't want to feel left out.  The game is going to offer a unique 2 vs 2 co-op mode, perfect for parents that want to play with their kids.