Thanks a lot !
I know that, but what list ?
For exemple, to get a googleplay leaderboard in construct, you give its ID, i.e. a string, visible in your google developper console app. No problem.
-> GooglePlay: Request public all-time hi-scores from "CgkI1_2hh6IQEAIQAw" (25 results, top). Force reload: True
But for the Achievements, Construct don't want the achievement ID (available in the same way in the google console) but... an Index !
So you use then something like that (after calling the list of achievements from google)
GooglePlay.AchievementDescriptionAt(INDEX)
And... nothing !