Chalgyr's Game Room writes:
In 1987, the world first met Samus Aran, and I fell in love. In '91 and '94, we collectively enjoyed the second and third games, and the Metroidvania subgenre was born. 2002's Metroid Fusion was the original reason I bought a GBA, and the reboot of Metroid 1 in 2004 was the last we heard of the 2D Metroid series.
...Until, that is, a horrible lab experiment takes the protagonist, Trace, to an alien world and leaves him to his own devices. The story remains vague at first, and unfolds at a steady pace that never leaves you starving for or inundated with plot. This allows you to let the storyline of the game do what it was always meant to do: provide a reason for awesome gameplay to happen.