I have two PRs (one in GW4 (go like if you haven't already :p) (https://www.airwaysim.com/forum/index.php/topic,71221.0.html), one in LHC) and they have 15 likes in total. Is the PR Master achievement supposed to be 15 likes per PR or 15 likes across all PRs?
My uneducated guess is that it's 15 for one single post. Which makes it rather undoable.