Syphon's Ratings and Reviews
Oxide by Cyclamen32 [SM Exploration], rated by Syphon on Nov 08, 2019 (Star Star Star Star Star )
169% in 1:58
This is an awesome hack with interesting item and boss placement.

Very easy and quite short but I had a lot of fun playing this.
Nothing was really hard to find and I liked the path progression.
Only negative is having to kill all enemies in one room during the escape but it didn't bother me that much.

Fully recommended.
So Little Garden by MetroidMst [SM Exploration], rated by Syphon on Nov 04, 2019 (Star Star Star Star Star )
67% in 1:06
Awesome hack.

Map bug and massive lag during the boss fights and especially during the Monstool Mash fight were annoying but those are my only complaints.

Loved everything else about it. Nice custom graphics, custom hud/music/enemies/items. Good level design with many secrets.

Play this hack.
Eris by Digital_Mantra [SM Exploration], rated by Syphon on Oct 28, 2019 (Star Star Star Star Star )
76% in 6:49
Eris is a fantastic and very immersive hack. DMantra absolutely nailed the atmosphere and visuals which makes this hack still very unique despite being from 2009/2012.

Difficulty-wise it's a bit on the harder side but an experienced player familiar with Super Metroid hacks should be able to beat it.

I absolutely recommend it.
Project Base 0.7.3 by begrimed [SM Improvement], rated by Syphon on Oct 23, 2019 (Star Star Star Star Star )
80% in 1:32
Decided to replay this after finishing Hyper Metroid quite a while ago and recently Ancient Chozo which also use Project Base physics and mechanics. Initially didn't like the changes but it was just matter of getting used to it. It actually felt pretty great. You can tell this was made with speedruns in mind as you pretty much blaze through the rooms.

It's something I would especially recommend to Fusion and Zero Mission fans who can't get into Super Metroid because of the physics and want something more fast-paced and obviously speedrunners.

5/5
B2-TW by Grime [SM Quick Play], rated by Syphon on Oct 20, 2019 (Star Star Star Star Star )
10% in 0:06
Very nice!
Ancient Chozo by Albert V. [SM Vanilla+], rated by Syphon on Oct 16, 2019 (Star Star Star Star Star )
91% in 3:59
Not a fan of halfhacks but that said this is a good hack.

My biggest issue was obviously that it's quite linear and that the route was same as vanilla which I get was the intention but I just prefer full hacks instead of halfhacks. Though it gets a little more open later.

I also hated the change to the diagonal bomb jump which was added in this version(1.1.0?). The amount of times I got launched through the room by accident was too much. I even fell down a door in Maridia once and had to go the whole way around because of it. Really hate that physics change.
Also that turtle on the giant statue in Maridia shouldn't take 25 Super Missiles to kill.

The graphics were gorgeous and among the best I've seen in a hack. I also liked the music changes.

On a second thought though, I think this deserves 5 Orbs. The few issues I had weren't that detrimental to my enjoyment and it absolutely is 5 orb worthy in the Vanilla+ category.
Super Metroid Contamination by Lioran, Aran Jaeger [SM Challenge], rated by Syphon on Oct 13, 2019 (Star Star Star Star Star )
No completion stats.
Like I mentioned on Containment Chamber, this and the other hack are well worth it if you want to learn new tricks and techniques. Even if you are like me and have to look up all the solutions you will end up coming out of this as a better player.
Super Metroid Containment Chamber by Lioran [SM Challenge], rated by Syphon on Oct 13, 2019 (Star Star Star Star Star )
No completion stats.
This and Contamination are well worth it if you want to learn some new tricks and techniques. Couldn't do the execution on the final puzzle though and had to cheat myself blue suit. That one felt harder than anything even in Contamination execution-wise.
Super Metroid: Ascent by Benox50 [SM Exploration], rated by Syphon on May 28, 2019 (Star Star Star Star Star )
98% in 6:30
Ascent is a masterpiece and the best Metroid hack I have ever played. I enjoyed it so much that I wanted to go for 100% straight away but missed one or two items in the last area that I couldn't find even after searching for a while. Maybe next time.

Anyway, level design, aesthetic, challenging but not too difficult puzzles, exploration. It does all of those right. I also loved all the new features/mechanics that were implemented.

Do yourself a favor and play this hack. It's a blast.
Super Metroid: Escape II by Hiroishi [SM Exploration], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
65% in 5:51
Awesome hack with a lot of blue and 3(!) SpoSpo fights. One of the best exploration hacks out there. It also has a long escape sequence which I am a big fan of.

It's not very difficult either with the exception of some shinespark puzzles for optional items (usually Missiles or Supers).

I fully recommend this hack.
Hyper Metroid by RealRed [SM Exploration], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
83% in 4:41
One of the greatest hacks in my opinion. Play this hack.
Super Zero Mission by SBniconico [SM Exploration], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
53% in 6:15
Everyone experienced with Super Metroid hacks should play this hack.

I first played this hack about 6 years ago (2013) and even though I was a beginner I still managed to beat it. Advanced techniques are only required for optional items.

A very unique hack and still one of the best Super Metroid hacks despite the difficulty spikes in the Pirate Ship and Chozodia.
Super Metroid: Z-Factor by Metaquarius [SM Exploration], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
77% in 7:29
One of the best Super Metroid hacks.

There was a noticable difficulty spike from the moment you reach the Wrecked Ship.
Maridia is intimidating at first and seems like it never ends but once you figure out where the elevators are you pretty much get to where you want easily.
Lower Norfair is probably the weakest point of the hack and where the difficulty was ramped up to unnecessary high levels at some points in my opinion.

However, Tourian made up for that and was fantastic.

Play this hack.
Searching for Items by Terimakasih [SM Exploration], rated by Syphon on Nov 09, 2019 (Star Star Star Star Star )
92% in 1:27
This hack is pretty awesome especially for a hack that was made in 2005.

It's easy and on the short side but collecting items is just so fun in this hack because they are hidden everywhere.
Plasma Beam is a bit hard to find and Ice can be missed if you don't look hard enough but other than that I had no problem finding items.

The escape was another highlight of the hack I didn't expect. Really enjoyed it.

Play this hack.
Super Metroid: Arrival by Jefe962 [SM Exploration], rated by Syphon on Nov 06, 2019 (Star Star Star Star Star )
89% in 2:06
A good hack with nice graphics as well and also custom music.

Physics changes were okay but Space Jump was way too hectic.

Like Vismund and MetroidNerd said, the back and forth between areas after getting a major upgrade was annoying.
The final area looked nice but was way too short.
Level design was pretty good.

Difficulty: It's a pretty easy hack. Gold Torizo is annoying fighting normally but you can cheese it by attacking from where it can't reach you.

Recommended.
Metroid: Falling by TN [SM Exploration], rated by Syphon on Nov 06, 2019 (Star Star Star Star Star )
92% in 5:36
Just like the sequel hack, Super Metroid: Hidden, the author greatly changes item and path progression. Even more so in this hack than in Hidden. I believe at one point you could decide to go to Draygon, Phantoon or Ridley in any order which was pretty neat.

Difficulty-wise it's slightly harder than Vanilla but not by much with the exception of one major complaint which are the tough bosses. Kraid in particular was absurd.

The hack is worth playing for the unique progression/item order and well-done level design.
Super Metroid: Hidden by TN [SM Unknown], rated by Syphon on Nov 05, 2019 (Star Star Star Star Star )
91% in 4:53
Solid vanilla-style hack with interesting item and path progression. Things are well hidden (hence the name of the hack) and often not where you expect them to be.
Like another user mentioned, it feels very old-school and reminds you of old-school hacks like Super Metroid Legacy.

Space Jump and Plasma Beam are missable items which is odd as usually major items are displayed on the map. I never found them. I saw unexplored parts on Tourian's map but never got there. I guess there were some secrets.

For some reason what I guess was supposed to be the acid-lowering Chozo statue in Lower Norfair didn't work for me unless I missed something. Had to take an acid bath.
Lower Norfair's map not being viewable was slightly annoying.

Missile doors taking 10 missiles to open for some reason is a bit annoying at the start but the game throws missile expansions at you so it becomes a non-issue very fast.

Difficulty is a bit higher than vanilla.

All in all this is definitely a well-made hack. It isn't groundbreaking but if you're in the mood for a vanilla-style hack this is worth playing.
Super Metroid: Advent by Shadow96 [SM Quick Play], rated by Syphon on Nov 02, 2019 (Star Star Star Star Star )
34% in 0:46
Very atmospheric and nice looking hack.
Super Metroid: MINI by Mr. Hiryu [SM Unknown], rated by Syphon on Oct 26, 2019 (Star Star Star Star Star )
87% in 2:10
This was a fun hack. I liked the redone music. Graphically it's not really a looker and I found one permastuck in Maridia but the level design was well done. I had no issues finding any major item.

One thing I'm not sure why exactly it happened but Space Jump suddenly stopped working for me once I got to Lower Norfair and it never worked afterwards.

In any case this is worth playing.
Super Metroid: Y-Faster by Metaquarius [SM Speedrun/Race], rated by Syphon on Oct 17, 2019 (Star Star Star Star Star )
43% in 34:15
Gotta go fast.
Cliffhanger Redux by Digital_Mantra [SM Challenge], rated by Syphon on Oct 16, 2019 (Star Star Star Star Star )
83% in 14:39
A great hack that is challenging without the need of mindlessly putting spikes anywhere.

I usually prefer easier hacks or at most Z-Factor and Super Zero Mission difficulty (which are difficult in their own way but don't require advanced techs) so my knowledge about advanced techniques was limited. I only knew how to perform IBJ, Mockball and short charging until recently when I played Containment Chamber and Contamination prior to this and learned some more different tricks. This hack even further improved my skills as a player thanks to difficult but fair challenges.

Would have given 5 Orbs but there were a few moments where I absolutely didn't know where to go. Draygon and especially Space Jump were hard to find in particular.
That said, I'm not *that* good at the game so finishing this was very satisfying.
So Little Collab by MetroidMst/Vismund [SM Exploration], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
69% in 0:59
Replayed this recently. It made me oddly nostalgic for the Summer 2014 when I played this for the first time.

Definitely worth a playthrough. Nice graphics, custom music and enemies. Loved the ShyGuys.
Legacy by Banana Oyaji [SM Exploration], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
85% in 3:59
One of the first hacks I played about 6 years ago. Very nice entry hack together with SM: Nature.

Play this if you are new to Metroid hacks, like vanilla-style hacks or are interested in seeing what a 2005 hack looks like.
Super Metroid Nature by Jefe962 [SM Speedrun/Race], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
91% in 2:46
This is a nice gateway hack recommended for everyone new to romhacks or fans of vanilla hacks.
Phazon Hack by A_red_monk_called_Key [SM Exploration], rated by Syphon on Nov 10, 2019 (Star Star Star Star Star )
66% in 7:24
"0.3 Review"

Now this hack is definitely special. I remember playing this as one of my first hacks ever in 2013 but never finishing it until now.

Red Monkey, the author, claims on the forum thread that "Super metroid Phazon Hack is a full hack for people new to Super metroid hacks."

While this hack is not super difficult I would not recommend it to a new player. Exploration difficulty is much higher than in vanilla. You get hints via navigation rooms but you will likely still search a while for the next major item. It also took me a while to figure out that certain doors can be opened with Grapple Beam.

Beam upgrades are extremely weak unless you use different combinations (aka disable Dark Beam) which makes it bearable but enemies still feel like sponges. They also deal a lot of damage especially late game. As a result you often find yourself forced to use Super and Phazon missiles which aren't that easy to refill.

The last area felt a little disappointing for taking 9 items to access.

Also, the game froze 2 times on me in the Phazon Mines for some reason.

That said this is definitely a good and unique hack. You can see the effort that went into this with remade graphics and you really feel that this is a different world and not Zebes.

I do recommend this hack as it absolutely is worth playing but spongy enemies/unrewarding beam upgrades and the disappointing last area make this a 3-orb hack for me.
Super Metroid: Vino by Cyclamen32 [SM Unknown], rated by Syphon on Nov 07, 2019 (Star Star Star Star Star )
81% in 5:40
It's a bit risky to download a hack that has no description, no detailed reviews and a screenshot of Red Crateria. It meets many requirements to be absolutely awful. Surprisingly it is actually a decent hack.

It's an Exploration hack that does a few things differently.

For one, the author likes putting fake orbs in a room with the item hidden somewhere else in that room.
I spent probably an hour looking for Grapple and Wave Beam wondering where I missed them. Not finding Grapple was my fault. Wave could be missed as it was behind 1 Power Bomb tile. It's a required item so it should have been more obvious in my opinion.

Many areas are a bit darker. It feels like there is some filter on top. It gives areas a different atmosphere.
The bomb jump timer was changed which was slightly annoying.
Enemies are tougher which is very noticable in the beginning.

The most interesting part was probably Lower Norfair. It's not what you expect.
Difficulty-wise it's harder than Vanilla. Not by much. Short Charge is required for a couple of optional items.

I recommend it. Red Crateria looks awful but for a hack that was made in 2010 it does things quite well.
Ice Metal Uninstall by Crys [SM Exploration], rated by Syphon on Oct 20, 2019 (Star Star Star Star Star )
83% in 4:21
This was the first hack I ever played about 6 years ago but I never finished it until today.

The hack is very open-ended and it's possible to miss a lot of items. I didn't find Ice Beam, Spazer and Screw Attack. Also speaking of beams I found them all extremely weak with the exception of Grapple. I believe this was done on purpose for balance reasons so different beam combinations work better but it wasn't balanced very well in my view.

I wasn't much of a fan of the level design. Many rooms felt a bit annoying to traverse and I wasn't very fond of having to do the Deep Ice -> Surface sewers -> Steamfair -> Subterrane route just to backtrack to the Surface every time. I felt there should have been a shortcut unless I have missed it.

I did however like the lore and the general open-ended nature of the hack.

All in all it's mostly enjoyable with some annoying parts. Worth a try.
Lost World by TROM [SM Exploration], rated by Syphon on Nov 11, 2019 (Star Star Star Star Star )
No completion stats.
This review is for version 2.0 which can be downloaded in the forum thread.

Alright, I did not finish this.

This hack has permastucks in the sense that you can access areas (without using advanced techniques!) you shouldn't be in without required items and a few unmorph permastucks in some cases. Seriously, did he not have any testers?

Entering the Mountains area means you can't go back in case you missed CHARGE BEAM (easy to find but can be missed) which you need for the second boss since you don't have enough missiles to beat it.

Same area, some time after you get Power Bombs, you fall down a shaft with a morph tunnel on the left with a blue gate that wasn't properly blocked off I guess? If you go this way you will be permastuck. The author expects you to have Grapple Beam in that area so you can get Speed Booster to get out.

I quit there because I unfortunately saved at the Save Station in the Grapple-required area and did not feel like doing everything over again especially since there are likely even more permastucks. Really made me angry.

I cannot recommend this hack in this state. You will possibly get permastuck at some point because the author didn't polish/test the hack despite it being 2.0. It's a shame too because what I played up to that point was pretty decent.
Super Metroid Weekend by dewhi100 [SM Unknown], rated by Syphon on Nov 08, 2019 (Star Star Star Star Star )
3% in 0:06
Nothing special about it but nothing offensive either so I'm giving 2 orbs for managing that in a weekend. Also SpoSpo boss music during escape :)
Vismunds Sidehopper Special by Vismund Cygnus [SM Unknown], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
22% in 0:23
This hack is really weird.

Backtracking is recommended or you will miss items and get to Ridley underpowered.

Would have been better to place an eye-gate before Ridley to let people know. Stumbled into him without fully refilling in the previous room and without Spazer and Gravity Suit. Since I didn't want to restart the hack I had to cheat in the boss fight.
Enigma by Quietus [SM Unknown], rated by Syphon on Nov 08, 2019 (Star Star Star Star Star )
3% in 0:00
It's not much of a hack. Just an edit of the Landing Site with spike challenges.
Super T-Metroid by kokoakki2 [SM Unknown], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
No completion stats.
Just no.
I Wanna Be The Metroid by Maxg26 [SM Challenge], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
No completion stats.
Don't.
Super Metroid Impossible Redesigned by pathomSM [SM Challenge], rated by Syphon on Feb 01, 2019 (Star Star Star Star Star )
No completion stats.
It's what you would expect from someone who originally tried to rate his own hack with 5 orbs and calls everyone who dislikes it "casuals", "trash" or "bad" (Thanks for the lovely PMs, author).

Anyway, don't bother with this unless you hate yourself.