I'm not sure if I was clear enough. Look, the way it displays the achievements in SummVM is a grey popup with the achievements name like Steam does. But Steam is lower right side of the display(subtle). In ScummVM It's in the middle of the display. Not very subtle. In Steam you can turn them off by ...

The game is 'The Excavation of Hob's Barrow'

The game has a lot nonsense achievement popping up all the time you do trivial things. That is the main porblem for me here.
I like to look at achievements after I finish a game.