Gameplay needed a bit of an upgrade, for example many codes will be left on monitors that dont stand out or give you an idea they are needed for a code. They also put these codes on destroyable monitors so that if you break one you cannot progress. There is no direction on what actions need to be taken to complete each level leading to hours and hours of searching empty levels for maybe that one bit of info thats missing. They also like to put instant deaths in random spots just to kill you, for example i bought an item out of a vending machine and the game decided to give me a live grenade instead as a joke. Enemies all have instant lock on and hit scan weapons, even weapons that are thrown are actually hitscan so you cannot dodge them. Its just too bad they wasted such a good idea with 30 year old game ideas that use old school mechanics to keep you playing but people today dont want to waste hours looking at empty hallways with no directions on what do.
Repetitive gameplay that stagnates the longer you play because you realize each area is almost the same as the last. First game knew this style does not work for long so it kept it short, this game becomes tedious and is to long. I don't recommend this game at 30 bucks, thats really asking a lot, this is a 3 dollar game.
Its not even possible to play this game it just crashes constantly and randomly. I get that this is a free mod and a small team made it but right now its not worth your time or effort, even to get this to run on the steam version is a huge hassle so avoid it if its not the GOG version too.