Can we talk about the 2D Metroid games? I've played Super Metroid two years ago and recently finished Zero Mission and Fusion for the first time.
Super Metroid is really impressive and far ahead of its time. I found the scripted sequences to be especially noteworthy, they're not something you'd expect from a SNES game. Crocomire's skeleton emerging from the lava right after you beat him managed to scare me.
I probably like Super Metroid the most out of the three, it's the most polished one and has the biggest map if I remember correctly. Best bosses, too.
Zero Mission is surprisingly good, I expected less. At first I was bugged by the waypoints that show you where you have to go, but as the game progressed I was glad to have them because I'd have probably spent hours wandering around aimlessly.
Fusion was a pretty big disappointment for me. I hate how the story is constantly being shoved in your face, a bit subtlety would've done wonders. Briefing rooms that tell you exactly what to do and where to go are a horrible idea and make the game feel extremely linear and railroaded. Just stop bothering me and let me play the damn game.
Speaking of linearity, the world design sucks. There's a hub that leads you to six different areas that aren't interconnected which makes the game feel way less open than Super Metroid and Zero Mission. The areas are terribly uninspired, too. Water World, Fire World, Night World… what is this, a fucking Mario game?
Bosses aren't noteworthy either. Nightmare is pretty decent, I guess.
I've probably been a bit harsh on Fusion, it sounds like I hated it. It was alright, I bothered finishing it after all, but I expected it to be on par with the other two.
Opinions on the series?
I'm going to play through the Prime series next. Only played the original Prime on the GCN when it came out, looking forward to see how the games compare to the 2D Metroids. Also looking forward to finally play it with M+KB instead of awkwardly fiddling around with gamepad FPS controls.