ovo sam iskopirao sa https://www.reddit.com/r/metro2033/comments/8qiof7/metro_2033_vs_metro_2033_redux_differences/
Metro 2033 Redux also added some additional portions that weren't in the game, or changed areas. There's some spoilers in here, so just-in-case I've marked everything up to keep the game unruined for those who may be playing for the first time in anticipation of Exodus.
The narrator is different, his voice more deep and depressed. 2033 redux has a more excited-sounding, less monotone narrator. The difference really helps set the tone of the game, and the original 2033 felt more dark and depressing because of it.
There were no 'Spartan' or 'Survival' modes in the original 2033, only the game difficulties. The hardest of which was 'Ranger Hardcore.'
In the original you could equip 3 weapons even on Ranger difficulty, 4 if you include the equipable knife. (as mentioned by /u/AGUDNAME)
To get a weapon with a suppressor... You had to find one laying around/from a dead enemy or buy one that was on sale. You could not customize weapons at vendors to your liking. This made even 'bad' weapons incredibly valuable if they were suppressed in 2033.
The laser in the original 2033 is much smaller and more pin-point. Unlike 2033 redux, the original laser did not have a beam projecting out of it a short distance. Made hipfire a little harder.
The Abzats is completely missing in 2033 redux. A shame, this weapon was hilarious to use. It's belt-fed, automatic shotgun and it ate all your shotgun ammo, but it was fun.
The knife was holdable weapon in the original 2033. In 2033 Redux you only see the knife when you use melee.
Nosalises in 2033 are furry, which makes them a bit more hideous than their bare versions in redux. Watchmen are also a bit uglier in the original, looking a bit more like mutants. Lurkers used to look like scaled down, naked Watchmen! Demons look like flying saber-tooth cats, and the Librarians look mostly the same.
Shrimps make no appearance in the original 2033, nor do the small shrimps you can find crawling on the surface areas. In redux you can encounter shrimps by a river near the alley leading to Library.
The night vision goggles in the original 2033 could be folded down and turned on/off while they were down, instead of being either folded down and on or folded up and off.
Trolley Combat in Redux has no tank to fight, making the level easier. (pointed out by /u/WOGN)
At the Armory there are two suits available for sale near the gun vendor, a stealth and armor suit. These are completely absent in Redux. Stealth suit makes you very stealthy, but you want the armor suit if you're playing on ranger hardcore for a later mission...
Andrew the Blacksmith wears a hood and looks a bit more like a normal citizen than a blacksmith in the original.
The Red Line prisoners held by the Reich in the War(?) level are by the Reich camp near abandoned Metro Cars (original), rather than down in a mechanical/sewer pipe area (Redux).
The library portion in 2033 redux has an additional fight against swarms of Watchmen, which didn't happen at all in the original. In the original when Miller says 'looks like this is going to be tougher than the library,' you would assume he was talking the demons which attacked you.
In the original, the camera will enter third person when you get into the truck and ride to Church. Third person perspective is only ever used in the introduction and closing of this game, so it was pretty noticeable. In Redux, this scene is entirely in first person. (corrected as pointed out by /u/WOGN)
There is no holdable flamethrower in the original 2033, only mounted ones. This makes the tunnels leading to D6 much more difficult than 2033 redux, where you can just burn any nosalises that get close to you or the person you're guarding.
You'll encounter spider bugs when separated from the group on the way to D6. In the original, there were no spider bugs, instead I believe there were some nosalises.
Ah, the reactor and D6. Myself and fellow 2033 original veterans did not miss the amoeba portion - which while still present in 2033 redux, was drastically easier even on the hardest difficulty. This section was absolutely suicide on the original Ranger mode. The amoebas took multiple hits to kill, Miller was largely useless, and you died with 1 close explosion from an amoeba (I didn't buy armor suit, it might help with this). Their spawns didn't resemble enormous eggs which were easy to kill in the redux version. The spawns would also throw out multiple amoebas. Often times ten or more would attack from the front and behind. Fuck this level in the original.
While the gunplay in Redux is a step up from the original's clunkier controls, something that felt worse was damage and hit registration. Nosalises especially seem tough in Redux, and combined with their jerky animations and speed in close quarters, they can be quite difficult to hit at times. Sometimes when you do hit them, I've had moments where it took in excess of 10 rounds from an AK to down one of them.
