So, I'm on vacation (nothing fancy, just visiting family) and got a few Switch games for that occasion including Metroid: Dread. However, I felt that the Switch is a bit awkward to use on a plane so I also dug out my PS Vita. Incidentally I haven't been able to log into the Vita store (even though AFAIK it should still be online) so I figured "what the hell" and hacked my Vita. Long story short: I just beat Metroid: Zero Mission, the GameBoy Advance remake of the original Metroid, on my PS Vita using Retroarch (with achievements and everything!).
One of the reasons I decided to play the game was that there were some things that seriously frustrated me about Dread and everyone on the internet and their uncle is like "duh, that's just Metroid". Well, in my memory oldschool Metroid (Super Metroid and later, that is) wasn't like that - and I was right.
I actually played Zero Mission (and Fusion) in the past on a GBA that I borrowed from my cousin, though I couldn't quite get into it back then (I did almost beat Super Metroid on SNES, though). As far as I can tell Zero Mission is basically the original Metroid remade on Super Metroid level in terms of technology and design. There's a map, you can crouch and shoot diagonally and over the course of the game you get most abilities from Super Metroid. At first glance the level design is actually quite similar to the original game's, as are many (most?) of the enemies, though surely there are numerous differences that utilise the new abilities. And you do get a whole new epilogue.
Now, what can I say? It's Metroid. The intro tells you to destroy Mother Brain, so you spend a few hours exploring alien caves and tunnels, shoot all sorts of creatures which aren't metroids, get new abilities which allow you to open new doors, destroy certain blocks or just reach places which were formerly out of reach, finally kill some metroids and ultimately also Mother Brain. It's honestly as basic and pure metroidvania as it gets.
The core loop of metroidvanias is of course satisfying here as ever, though I must say that it would be more satisfying if I also got ablitiies that I didin't know from earlier titles in the series. It frankly feels like the developers ran out of ideas for the series very soon (and even Dread reuses mostly stuff from Super Metroid, sheesh). But it does work. As a run and gun game and platformer it's competent and for the most part very casual compared to other oldschool titles. You have tons of health and if you keep exploring and gathering health and ammo upgrades even the bosses become easy as you can take a lot of hits and just spam missiles then.
The biggest challenge in the game is the navigation, but even that one isn't all that difficult. The map, which is structured in a square grid and thus super easy to read (unlike Dread's abomination of a map), basically saves you all the trouble of having to remember where you saw which kind of door. The map does not show you destructible blocks but what it (most of the time) does tell you, is your next destination (another thing Dread doesn't do). With the information you're given and the structure of the world it's pretty easy to find the only possible connections and spam whatever ability you just got in the right places, hoping to find a secret passage that will lead you to your next goal. It's not super difficult but it is still satisfying when a whole new part of the map opens up because you found that one little fucker of a block. And once in a while finding a passage, mostly the optional ones, even borders on a puzzle but those cases are frankly disappointingly rare. But even outside of the map the game handles guiding the player quite elegantly. Its world (unlike Dread's) has a pretty good flow and sometimes also makes big things happen when you pass an earlier spot just to confirm that you're on the right track and don't miss a hint. Honestly, my only complaints here are that it could be a bit more puzzly and should have interesting abilities that Super Metroid didn't have.
As I said, story-wise there isn't much going on inside the game itself, but you do get some fancy comic panels for certain bosses. HOWEVER, then you get the epilogue which turns the game into thel shittiest stealth game ever and apparently ties Zero Mission into some bigger lore that the series got over the years - you do get some somewhat cryptic story event with some messianic nonsense going on and then the shittiest stealth game turns into a pretty good metroidvania again. The end.
In summary it's basically "bonus levels for Super Metroid!" or something. It's good but I'm also disappointed. Not just because it turns out that the series apparently didn't introduce much stuff after Super Metroid but also because these definitive Metroid games haven't aged all that great - not because there's anything wrong with the games themselves but because there has been SO MUCH new stuff in the genre since and now Metroid is about as barebones as it gets and frankly does not even boast an exceptionally great execution.
Welp, going back to Dread.