@Cowboy69 Problems Encountered:
(I found all of this while playing in first-person mode)

Part 1
1- Almost Incomplete Gameplay: As I mentioned in my review of GTA VC Extended, the first-person gameplay problems are also present here (but excluding the ability to swim, since unlike GTA VC Extended, it's not available and there are no animations for it). Anyway... The "JUMP" problem is also present here (since I mentioned that when playing in first-person mode, jumping in any direction is possible in third-person mode, but in first-person mode, the character will "ALWAYS" jump only forward). This is detrimental if a thrown weapon lands in front of you (and for some reason, grenade damage in GTA 3 covers a fairly large area, so even if you're relatively far from where it landed, you'll still be hit). (It can do some damage) And I'm not just saying that because I was literally quite far from a grenade, and I wonder how it hurt me when I wasn't even close.

Also, the third-person walking animations aren't present in first-person mode. (As I mentioned in the GTA VC Extended review, when walking in third-person mode, if you press the A key, the character will turn right and walk in that direction; S will turn backward and walk in that direction instead of just moving backward while looking forward (as is the default animation in the game); D will turn left and walk in that direction (and all this without moving the mouse). However, in first-person mode, if you press these keys, the character will perform a different animation than in third-person mode (which doesn't bother me much since they are the default animations for the game). But if they can be implemented in first-person mode in both modes, that would be great. Games or future games that have the option to play in first-person mode would be great (although personally, the only thing I dislike is the jump animation), since it's annoying that the character always jumps forward when I'm looking in another direction.

2- Problems with some vehicles: Here I was surprised that, unlike GTA VC Extended, there are new problems with some vehicles (except for the last one, which is present in GTA VC Extended and I expected it to be here too). These vehicles are:
- The Mafia Sentinel car: For some reason, when driving it, the blue mission icons are not visible (and the strange thing is that with other icons, like the "Rampages," they are visible, so I assume that the hidden object icons will also be visible (and I say "will be" because I haven't tested this, but I assume it must be the same). And I'm afraid that It has to do with the windows this car has (Even if you're inside the blue icon, you can see it appear, but if you back up or move away and try to see it through the windows, it's invisible).
- The ambulance: When doing the side missions, the blue arrows that appear above the people who need to be taken to the hospital won't be visible (And that's something I didn't see coming).
- The Reefer boat: When driving it and looking out the front windows, for some reason, the sea water disappears.
- The police Predator boat: Only when you look behind you, for some reason, will the water disappear.
- The fire truck: Just like in GTA VC Extended, when playing in first-person mode, you can't move the camera to spray the water in a specific direction, and the water will only spray forward.

New:
- The Colombian gang's car: The same thing happens here as with the mafia sentinel, since when driving the Colombian gang's car you can't see the blue mission icons

Observations:
- I think the problem with the last two boats is because there's a shadow effect in the driver's cabin (I don't know if this can be fixed). But if it can be fixed, that would be great. Personally, I don't have a problem with these two boats, and I don't use them much in this GTA, but I still wanted to mention these "problems" with these two boats when playing in first-person mode.
- I don't know if this issue, along with the Mafia Sentinel problem or the ambulance problem, is present in other cars (because so far I haven't had any similar problems), but I would recommend testing all cars with tinted windows or verifying that all the windows on all cars are working properly.

3- Problems with some missions:
- The payphone missions for the Diablos leader "El Burro": After completing his four missions, for some reason they remain active, but without the blue marker, the sound of the The phone will still ring, and the icon will still appear on the map. It would be good if these missions stopped working because they're supposed to be completed, but they're still there.
- Marty Chonks' missions: To the right of Joey Leone's workshop (from the door where his missions start) there's a dog food factory called "Bitch'n'Dog Food." Between 9:00 AM and 7:00 PM, there are secret missions at a payphone in the corner that don't have an icon on the map or the blue icon. It would be great if this secret mission (which counts towards 100% completion) had its own icons.
- Ray Machowski's missions: When playing and starting his missions in first-person mode, right after the cutscenes and when you go outside, for some reason the first-person camera will act strangely. It won't look as it normally should (even if you get into a vehicle, it will get even stranger) And the only way I solved it was by changing the car camera until I got to first-person view inside the car. Also, in the entire bathroom area (and I mean the entire bathroom area, including both staircases and the lower floor outside the bathroom), for some reason, first-person view cannot be activated. Even if you are in these areas in third-person view, you cannot activate first-person view.

4- Problems with some map objects:
On the first island, I encountered four problems with some map objects (they disappeared when I approached them and disappeared when I moved away). These are:
- The collisions of a "vehicle" that should be parked next to Marty Chonks' factory and still has its shadow:- The two red roofs on either side of a building in Chinatown:- In our first shelter, the giant water tank on the roof above and the ladder to its right:- Another giant water tank and some stairs (the first stairs on the right, since there are two and I'm referring to the first one) in an alley near Luigi's clubAll these objects disappeared as I approached them and reappeared as I moved away (except for the first point, since those collisions with what I believe to be the back of a truck will always be there and will never disappear). Even in one of Marty's missions, there's a marker on the right side, and it's easy to crash into it.

These are all the object issues I've noticed (at least on the first island). I'm on the second island and haven't noticed anything similar. If I encounter any problems, I'll update this section.

5- First-person message in vehicles: This is a minor issue, but before activating first-person mode inside a vehicle by pressing the "V" key, for some reason, on the fourth attempt, a message will appear at the top saying that The first-person camera activates when the camera is positioned on the right side at the back of the vehicle, and it's on the 5th time you press the V key that the first-person camera will activate inside a vehicle.

6- Problem starting a game if you save in first-person mode: This is something that surprises me a lot because in GTA VC Extended there's no problem. When saving a game in first-person mode and then loading the saved game, the camera is in third-person mode, and when walking or leaving the shelter area, the first-person camera will activate on its own (unlike GTA VC Extended, where loading a game saved in first-person mode doesn't have any problems).

7- Strange animations when dying: As I mentioned regarding the strange animations in GTA VC Extended, there's a similar issue when dying. The thing is, the cops were dying, and something similar just happened to me (in the mission "Evidence Dash"). You have to collect evidence from a politician and then destroy the car with the evidence inside... well, the thing is, I had a 3-star wanted level and they had cornered me, and the vehicle called "Flatbed" ran me over and killed me. (Before that, I had pressed the "Space" key to jump, and Claude did the animation of throwing himself to the ground to avoid being run over.) The thing is, after doing that, Claude died with the animation as if he were running (I didn't press the run key at any point).

It's kind of weird, really. On the other hand, in this GTA, so far, I haven't had the same problem with the NPCs in the cars, where they seem to have a delay and magically appear behind the car while it's moving and then appear inside.

8- First-person blood problem: In GTA VC Extended mentioned that when aiming and shooting at the head or using a chainsaw, Tommy would start bleeding from his head (as if he were the one who was injured). Well, this happens here again, and I realize it affects everything, even explosions, if I'm not mistaken.

9- Problem with the game's photo mode:
When loading a game in GTA 3, a loading screen always appears. Something I didn't know is that when this loading screen appears, you can press the "ESC" key. If you then select the photo mode option, this loading screen will appear in photo mode, making it impossible to see anything. Therefore, it would be great if the "ESC" key couldn't be used during these few seconds to avoid this.

10- Problem with an NPC Part 1:
Although this GTA doesn't have as many models as GTA VC Extended, there is one NPC with a texture error. It's ID number 35, which, according to the website that names it, is "Young Woman." She's a girl with blonde hair, white sneakers with light blue stripes, blue pants, blue shorts, and a blue vest.

The problem here is that there's a black line down the sides of her legs (this can be seen in Marty Chonks' mission called "The Wife"). In this mission, we go to pick up Marty's wife, and the texture problem on this NPC's legs is most noticeable.


Well, these are all the errors I've noticed so far. If I find any more, I'll let you know.

NEW:

11- Problems with mission areas: This refers to areas with active missions where, for some reason, the game camera cannot be changed. For example: In Donald Love's building, at the bottom where the scoreboard is, you cannot switch between camera modes. (I mean that if you are in the lower area of ​​the building and you are in first-person mode, pressing the "V" key repeatedly to change the camera type will not work. Similarly, if you are in third-person mode, you will not be able to switch to first-person mode or any other game mode.)
(If I find more problems with areas like this, I will update this section)

Note: Below, a user named "Roberto134" posted two photos that seem to confirm what I suspected. The object causing collisions in that factory is a cargo truck at the back, and there appears to be another one in that area (personally, I don't recall seeing another one, or even its textures appearing or disappearing when I zoomed in or out). But it's most likely that the second cargo container is also there, but invisible and causing collisions. I recommend you look into this issue and fix it.

Well, these are all the errors I've noticed so far. If I find any more, I'll let you know.

I had no problems installing this. Looks great. How did you install?

> Yo, appreciate you takin’ the time to write all that, bro. Real respect for the effort and advice — I feel you. I’ll keep that in mind for the next uploads, make it smoother for both PC and mobile players. Much love for the support, homie. Stay up.

not yet but I'm busy
I will fix that soon. In the meantime, you can access the data and statistics of the weapon mods and delete the references.