Donkey Kong Classics is a collection of games from the Donkey Kong series, which includes Donkey Kong and Donkey Kong Jr.. This collection was developed by Nintendo EAD for the Nintendo Entertainment System.
It was released in October 1988 in North America, which was three years after the NES was originally released. In Europe, it was released on August 10, 1989. It never had a release for Japan.
There are no notable differences to the gameplay and modes. One thing that was changed was the design of the title screen, which is now a blue color. There is also the addition of the functionality to switch between the two games, as well as the singleplayer and multiplayer modes. Overall, both games remain the same in this collection.