"Bonus content" refers to additional material or information that is given as an extra or special addition to something already provided. Full definition
Considering the game will cost $ 60 at launch, you're getting a lot of bonus content for just $ 20 more. (heavy.com)
Three games with bonus content for $ 10 is a great deal. (pcgamesn.com)
As usual, these collections are packed with bonus content including artwork, different display settings, character models and various other things Mega Man fans will surely enjoy. (thenerdmag.com)