The obvious fix here is to only accept the top 20 games in all other lists, but that cuts out a lot of good games and nifty data (eg Gone Home and Firewatch).
Granted, this method isn't perfect (as I've done it) since not all sources have the same number of entries. The longest 11 lists consist of 100 games, where the shortest one is but 20. This causes issues as games like Gone Home or Firewatch, while appearing in about half of the lists each, average a position of about #40 - so the shorter lists typically don't have them in there, which costs those games points (since 8/25 lists are <40 games). Games like Hades, Hollow Knight, and Stardew Valley benefit from this since they're in just about every list - and near the top of all of them. The obvious fix here is to only accept the top 20 games in all other lists, but that cuts out a lot of good games and nifty data (eg Gone Home and Firewatch).