My favorite Metroid is a knockoff. Environmental Station Alpha. I can’t help but recommend it in any thread that’s even remotely on topic. It’s not “better” than the official titles but I end up replaying ESA way more. The astmosphere and music just really hit me, and the gameplay is tight with lots of secrets.

My favorite official title is Fusion though. It was so awesome being able to play that on the train to school and lunch breaks.