If you are a gamer over a certain age, your interest will have spanned several decades of industry change. By the time I moved from console gaming to the PC, during the mid-nineties, there was already a precedence for expansions to single player games. For example, I was bought Star Trek: Starfleet Academy back in 1998, a few months after its initial release. The game had an adequate amount of content that justified its retail price. A year later publisher Interplay released an expansion pack called Chekov's Lost Missions, featured seven new missions, two new multiplayer games, and various improvements to the game interface. If memory serves this cost half the price of the full game and by the standards of the time was broadly deemed an acceptable. Despite the title of the expansion, this was not content culled from the original game and was purely an optional extra. That was the nature of expansions at the time. They provided new material to enhance a game at a reasonable cost.