Disappointing Last Level: Compared to the psudeo-open world nature of the rest of the game, the final third turns into a mostly linear corridor shooter, while also adding bullet-sponge enemies around every corner and finishing with a rather poor Dual Boss fight at the end (with one boss being unkillable for story reasons).
Memetic Mutation: In Russia, this game is mainly known for its infamous translation made by Fargus Multimedia, which turns hamminess of voice acting Up to Eleven and replaces half of the dialogue with lots and lots of Russian swearing. It's still one of the most commonly used sources for Russian YTP videos.
The sheer amount of profanity said by everybody can be more hilarious than hardcore to modern gamers, who thanks to games like Grand Theft Auto are far more used to such language being used naturally in video games today.
Overshadowed by Controversy: The game had the unfortunate timing of being made on the heels of the Columbine shooting, and as such received calls to be banned from US Moral Guardians and even members of Congress for its violence and profanity. As a result, most US retailers refused to stock the game, and this is a major reason the game quickly sank into obscurity in North America. To this day in North America, it is remembered for this controversy more than any of its own merits or faults.
Retroactive Recognition: Modern gamers might notice some similarities between this game's art style and those of Half-Life 2 and Dishonored. This was one of the earlier video game efforts of Viktor Antonov, an art director and conceptual artist who would go on to make major contributions to the art design of the latter two games.
The grenade launcher from this game. Most grenade launchers in video games either fire grenades that explode on contact with enemies, hold more than three rounds in a magazine, let you carry more than 18 rounds total (especially if the game's bazooka has a clip of five shots and an ammo cap of one hundred rockets), take less than four seconds to explode, exist in games where enemies aren't smart enough to run like hell before the 'nade goes off or some combination of the above. Kingpin's grenade launcher is not any of these things. It's so bad that not even the AI can figure out how to kill you with it.
The flamethrower doesn't do nearly as much damage to enemies as you'd think it would. Enemies lit ablaze with it mostly run around flailing for a few seconds before returning fire again. In fact, since they can do damage to you while running on fire it can be just as dangerous to you as enemies. Of course, flamethrowers used by the AI can quickly chew through a player's full armor and health in seconds.