Preliminary: I like that my mission is clearly stated (albeit with some translation spelling mistakes), with a cool ahead-of-its-time transceiver UI. I love the MSX and MSX2, they imo are on par with NES with advancing mid-80s gaming. (For reviews from now on, though they will still end with Feel and Attachment more often than not, I will not always have Look first. It'll be based on the first things I notice as playing)
Play: 9/10
Wow, I'm getting into this right away. I didn't think I was big into the stealth genre, often requiring tedious patience, and figured early versions of it would be real rough. So far so good. The collision masks are awful, but I'm sure I will get used to them. Anyway, I like the feeling of rushing to get the Gas Mask, and the Resident Evil esque "get access card somewhere, use access card somewhere," and also like I've mentioned before, the quality and enjoyment of the guide I use can often determine how much I enjoy a game. I like that I'm just relying on a map with items labeled, and I can always reference the StrategyWiki if I get really lost but the map with items marked and transmissions are enough so far! Love that feeling! Like being young again.
I really like how the items are used, it's like you set them in the bottom right of the UI and they're constantly activated. It's like wearing the Gas Mask, or having the Access Card ready to use. Neat. The Inventory system and menu are clear and easy to use, reminding me of the Konami Goonies II game too which is coming up. pI do wish you could move diagonally, especially since the enemies can shoot diagonally.
Pro-tip: it seems most Rations and Ammo boxes respawn, so just exit reenter exit reenter till you're topped off! And with higher class (from saving Prisoners) comes higher capacity!
On my 2nd play session/evening of playing, by the time I got back to the first building's basement to rescue the doctor's daughter, I felt like I was great with the controls even without diagonal movement. I was going back and forth shooting, knowing exactly the line of sight, etc. Very responsive controls, again the MSX2 impressing me. It had that Castlevania feel to the controls by this point. Good stuff. Another pro-tip: get to 4-class rank! and trust Jennifer, not Big Boss!! Her tips were critical.
Look: 8/10
Also right off the bat I noticed the excellent Look. The MSX2 really is top-notch. The UI was great both for the menus and the gameplay screen. The dialog boxes were neat and tidy.
On my 2nd play session, even without a strikingly amazing Look, this could be a Favorite still because of how much I love the gameplay and how addictive/attaching it was. After all, it certainly achieves its goal of a stealthy action-adventure with the Look and Sound, even if there isn't much sentimental with it. Hopefully the ending will have a great jingle and end screen! Ha. Otherwise, only the UIs and the Transreceiver screens were particularly striking, oh and the item icons in the inventory!
Sound: 8/10
Not in love with the initial music, but it's not bad. It's got an NES quality to it, but thankfully, less annoying than most NES music.
Feel: 9/10
Many obvious Feels came to mind--Resident Evils as I had to collect ammo (ah! it's not built into the handgun I found? lol) and with the typewriter sounds for the dialog.. and the dogs!... and the Rocket Launcher and the Sub Machine Gun and the Grenade Launcher lol lots. And the way there were different paths to return to a building, like say the Mansion in RE1 :-p or the different paths you could take in RE Survivor! Oh right lol and it reminded me of the Metal Gear Solids of course lol. Even that Mortal Kombat game where it was an action-adventure type game, what was that called. Ah, Mortal Kombat Special Forces. One other Feel that surprisingly came to mind was the later Zeldas heh, when you're having to avoid the deeper water parts till you have a certain item. This game did a lot of things first/early!
Lol! I love the Cardboard Box item/mechanic! And I love the little hints the Prisoners give. Coupled with the many contacts you have on the Transreceiver, I barely had to use the StrategyWiki tips! And all the guard/etc. situations I was able to solve. Tho I do think I would've been overwhelmed without the map with items marked, trial and error would've been fun because I find the controls well-done, the concept interesting, and the areas clearly referred to (unlike Zelda's absurdly cryptic wordings). Now, if only the Sound were better (people seem to like the MSX soundtrack apparently...) and the Look more striking (tho it was high quality... like they didn't have to include the light reflecting on the floor but they did haha 
On the 2nd play session I was still having a blast. I lovvvve this 4th wall breaking and the plot twist associated with it, I wont reveal too much :-p as predictable as it is now, this was definitely the first non-text-adventure videogame with such a plot twist I've played so far in the chronology project. 
Attachment: 9/10
Anyway, I was pleasantly surprised how much I loved this. Again, with the Sound and Look more remarkable, this easily would've been a new Favorite. Especially with the additional Feel of bringing up Resident Evils and starting a franchise I later loved as Metal Gear Solid. I came in expecting a lot of tedious mechanics and outdated ways of achieving the stealth genre, but I was thoroughly impressed. I saw a lot of reviews talk about the many issues of the game, but I'm realizing those were mostly for the NES version. I was going to play Runescape tonight--my husband is out of town and I've been gaming during our usual movie time--but this wound up sucking me in. Can I beat it all in one sitting?! The fact I have that urge, the fact I know I will tell my brothers about this and likely play it again, the fact it has such a strong Play and Feel--this deserves a high Attachment and overall rating. Maybe it will become a Favorite as I play the later Metal Gears and garner more nostalgia for the early parts of the series.
Omg wait! There's no way I can beat this tonight. This is so long! I thought I was nearing the end but this was all just the first building of 3! This is a long game!! I hope it can keep my interest--the first building was delicious. Interesting that it is so non-linear, in that you could skip entire sections, or savor the entire plotline return to Building 1 later etc (just now learning all this from StrategyWiki. Okay yea I would not have figured all this out with trial and error lol, like finding the Enemy Uniform etc. Like sheesh, I realize Schneider tells you the general location but uff, borderline Zelda type stuff but with logical in-game hints and well, more logical ha). I will of course be doing the full game, like I always do with Resident Evils. I wound up doing the path to Building 2 the first night, tho I said I'd only do Building 1. Sign of a good game right there.
Welp. I'm still having fun the 2nd night, tho a bit intimidated by the length. Lol that Big Boss calls me to tell me the signal had been jammed... no crap! I got the Antenna, at great risk mind you, for that very reason haha. And thank goodness these soldiers don't think to go into elevators, even during High Alert :-p And another funny quirk: just realized you can shoot Prisoners (and lose rank) >.< Thank goodness for the high-quality save system, and relatively forgiving death/continue system. The NES password system can't compare. Omg! And when Steve, Diane's husband, answers the transreceiver lol! In the middle of an intense boss battle (lol and then in the middle of me stressing about the overly hard final 2 bosses, the humor of her feelings toward you :-p ). Well-done humor. This game would be a lot more frustrating without a Map and guide letting me know which Access Card for each door, having to trial and error it while getting smashed by a cyborg would not be cool. But playing it as I did--a blast!
Ugh! Well, here will be the true test of whether I really love this game. I got all the way to Metal Gear, I felt plenty stocked... but turns out you need at least 16 plastic explosives (correct me if I'm wrong). I thought I stocked up enough before coming!!! Luckily it looks like Plastic Explosives are available at an early part of Building 2... but that's a long journey back from the Metal Gear weapon ugh. Maybe I should call it quits? Well, I went back for the Plastic Explosives. Now debating where to find Rations. They don't seem to be anywhere. Gonna try the final area/bosses one more time and if can't manage it, so it goes. The Metal Gear mechanic was tedious and frustrating, I can only imagine how the final boss will be :-p (Oh duh! Another pro-tip I meant to mention earlier: punching guards makes a chance for them to drop Rations, and that's how I restocked on them in Building 2 before returning to the final push :-p ). Ugh yea the Metal Gear segment just outright sucks. Super annoying mechanics. Welp I finished it at last. Good thing I had the hint from Jennifer's brother for which ladder to use. The ending jingle was good but not as spectacular as I had hoped (and the ending was pretty lame overall, I like the Transreceiver screen but give me something really new and special! I did like the comments after the credits ended, but wanted some like flash of Big Boss's face or something). It says a lot that I went back for the Plastic Explosives, but I may wait to see if/when I return to this before I make it a Favorite. Excellent game regardless. 
Completion: Main Story
Playtime: ~4h 30m
Darn, I thought my new system would make my reviews cleaner... this was a mess yet again ha. sorry. I wanna try to wait to write till the end of a game, but I'm always overthinking)