Vindictus, Continent of the Ninth, Tera.
Three games that share one simple gameplay feature: Hack and slash combat. (I know there's more games out there with the same concept, but these three stuck out the most because they are playable for US residents)
When vindictus was released, it had a pretty sizable community. Even I was playing on the day of open beta release and had a blast until the repetitiveness sunk in, but I didn't really mind that. Now today, the servers (at least for NA East) are barely active anymore. Cash shop players are still playing/paying, but not a sight of any players in between.
Tera had a pretty good release date last year, summer time is the best time for gamers, especially those looking for something new to play during the summer. I only played it during the beta, but the game certainly had potential. About a year later, it just recently adopted the free to play model. Not really sure on if it should have went free from the start, or was having trouble keeping subscribers satisfied. But the playerbase is once again growing strong after the switch to the new model.
Continent of the Ninth. I never personally played this game myself, just watched videos and read up on daily news of its progress. Thankfully its still free and still available to play, but there's barely any news of it floating around. Almost as if once the game was released, it was just left on its own to be played like how Warhammer Online: Age of Reckoning turned out.
So I don't really get it. I like the whole hack and slash concept, and very much would like to see other mmorpgs in the near future adopt this gameplay idea, but there's hardly any exciting news of our currently playable free action mmos. Are free action MMORPGs losing popularity?