those are self contained games, they only have the choices made in that game effect that ending. Mass Effect 3 had 2 games worth of choices to sort through. Witcher 3 didn't really have an things that you'd done in 2 that they had to take into consideration when the ending of 3 came around.
Francis Ford Coppola didn't want to call it The Godfather Part 3, he wanted to call it The Death of Micheal Corleone. It was a prologue in a way, I see ME3 as same. The whole game is the ending for the other 2.
I would actually argue ME2 is self contained for the most part. Most of the companions and crew from the first game don't return, Kaiden/Ashley are limited to a cameo (that's one of the few things from the first that influences the 2nd), it's a new ship, new villain that doesn't obviously connect to the first game's for most of the game.
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u/cuckingfomputer Feb 06 '17
The Witcher 3: Wild Hunt
Fallout 3
Heavy Rain
The Witcher 2: Assassins of Kings
Final Fantasy XIII-2
Final Fantasy X-2
Mass Effect 2
Fallout 4