Yes, a trend that you will likely observe with every single video game. Except for the people who become hopelessly addicted to a game (which isn't a good thing) it's quite normal for people to eventually move on or at least play a game less frequently than when they had just bought it. Really, this sort of trend is not some revelation. Two months after release is not a very long time. I'm not playing civ5 lately but it's not because I've given up on it. I suspect a lot of people are doing the same. We're simply waiting for fixes/additions to be made to the game first. When a game is farily buggy at release (or when the first one or two patches introduce bugs ) like civ5, it's pretty rational as a player to just stop playing it until those annoying bugs are fixed. Evidence for what? That civ5 is a less popular game than other mass market games like Call of Duty or Football Manager? I'm struggling to see what actual point you're trying to make here apart from the obvious trends that happen for every game.