Talk:Achievements/@comment-81.104.204.181-20180318171055

Seeing as "the first one's free" the only purpose I have known achievements for is to see how many people who own the game, ever played it (although for these games, you do need to complete chapter one for each, so it's not that free

it would appear the answers are: BGIEE - 28.1%

SoD - 3.3%

BGIIEE - 19.0%