One thing I will say, they did a great job with poor Mel, I think you're supposed to feel bad for Mel in-game too but Game Mel is frankly kind of irritating so while what happens is obviously horrible... it's less horrible... because I don't think Mel herself is a very likeable character.
Poor show-Mel seemed like a normal girl who got caught up in something she really wanted nothing to do with, pretty much dragged along because all of her friends were involved.
Also (graphic game-image, not a spoiler if you've seen the finale)
Spoiler:
Poor Mel gets a neck stabby rather than accidentally shot - it's pretty grim
Spoiler:
…what about Owen in the game…?…I didn’t feel as though his character really was given much substance in the series then ruthless…he was dead in the blink of a blink…but I guess that his character is more for Abby’s back story…I don’t think that I like this reverse thing and knowing their ending before we know their beginning and journeys…