Typo
In the first part of the post:
"TLDR: like books can't have the same ISBN, IF games should have the same IFID."
the second part of the sentence (after the comma) should read: "IF games shouldn't have the same IFID."
I know, for people who know what IFIDs are it's obviously a simple typo, but someone encountering the term for the first time might be confused.