There's these people in the gaming community called Achievement Hunters. They LOVE earning achievements and will buy dlc for games just to keep that 100% and add more to their gamer score. If you're doing paid DLC or even simple free dlc along with paid content. It should be obvious to add more achievements. This will bring back a decent size of the community back to buy your DLC. Respawn did this perfectly with Titanfall. After every major update and DLC drop, they added a good amount of achievements to keep people playing and coming back to finish the new ones. 343i is a good example of a dev that has failed at this. How many major updates have come to Halo 5? We're just now getting some new achievements with Score attack (a feature that should've been there day one i might add) and it only adds a few achievements that could be completed in 2 runs with the right team. Bungie is another dev that i would say hasn't really failed at this because they did a few achievements throughout their dlc drops but not enough. Simply complete the missions and beat the raid. Why didn't you add crucible ones or max out every subclass when the new three were added? Or clear all strikes in the game, complete a total of 100+ bounties, reach rank 3 in IB, get a flawless in ToO. There was so much they could have done but, were too lazy to do. From Software failed as well. No dlc drops have added any new achievements to any Dark Souls game from 1-3. Even Scholar or the First Sin which was a definitive edition essentially, only featured the same achievements from the orginal release of DS2. Developers need to recognize that achievement hunters are there and adding a little something to each content update would bring people back and getting you a larger profit.