Sometimes, a Sequel to a video game is completely different from the original; perhaps the designers got a little overexcited about creating new things. Other times, however, you get just the opposite: Essentially, extra levels for the original game. Either it's the same engine, or the feel is identical, or what have you; but nevertheless, the player feels slightly ripped off. Any way you cut it, you're paying full price for an Expansion Pack. Some old games did this in a manner similar to Divided for Publication, when ported to a system which couldn't fit all the stages onto one cartridge.