Basically follows on from Zero Mission's gameplay and progress design, but with Fusion's story approach, but told WAY better. They even made the "Any objections, Lady?" thing seem less forced by giving ADAM an extremely monotone, robotic voice while saying it, highlighting how strange it is for a literal AI to be essentially reciting something from it's RAM once said by a real human.
Gameplay is great for the most part. Still a little too linear but an improvement on Zero Mission. FAR too many enemies though and very little time allowed to soak up the atmosphere. Needed more quiet/empty areas.
As an action game though, it's a great time and a great return for Metroid, especially after I bounced off Samus Returns.