Base game achievements added since Version 1.31 are not required. This includes all Co-op Mode, Bounty Hunt Mode, Community Pack 2, Community Pack 3, and Mio achievements.
When Version 1.7.5 was released, this achievement's description was updated to specify that it only requires completing non-DLC achievements. As a result, DLC achievements have never been required for this achievement.
The requirements for this achievement were updated four times: in Version 1.9, Version 1.13, Version 1.22, and Version 1.31. Each update added more non-DLC achievements to the achievement criteria. The achievement has received no further updates, despite the fact that more base game achievements have been added since then.