If a game is even mildly successful, chances are that there's going to be a sequel. After all, it's a lot easier to rehash old ideas and sell a game with an established fan base than create a totally new game from scratch. But all sequels are not created equal. The typical game sequel improves on its predecessor by improving upon the game's weaker aspects, making sure that key aspects remain unchanged. Many sports games follow this formula.
Some sequels take drastic departures from the original.
And then there are sequels that just aren't that good, for a variety of reasons. One game that some consider to fall into that category is Paperboy 2. Paperboy was a very successful game and ported to many, many, different platforms. Part of the reason for its success was its original concept, which placed players in the role of a newspaper delivery boy. Sure, that sounds pretty boring, but if you've ever played the game you'll know that paperboys don't have it easy.