Go immediately left from at the start of Metroid: Zero Mission and you’ll find the Morph Ball upgrade exactly where it was in the original Metroid. The remake modernizes the first adventure of galactic bounty hunter Samus Aran, bringing it to the standards set by one of the greatest games of all time: Super Metroid.
The game from there applies the legendary SNES classics structure as Samus navigates the depths of the planet Zebes, finding new weapons that allow her to go further, tearing through the Space Pirate armada before encountering the parasitic Metroid life forms and the evil Mother Brain. You’ll be collecting items and abilities including the Super Missiles, Power Bombs and Speed Boosters, moves that became staples with the third game. The design fleshes out a game that was more ambitious than the tech of the time would allow, implementing enough new content to ramp up the pace without padding the adventure.