A.K.A.-47: To avoid cluttering the main page, here is a list of all fictionalized (or not) firearms in the game and their Real Life counterparts. Some of the names were changed to those of their real life counterparts in patches:
Thirty-Eight — Colt Police Positive
Brokk 17C — Glock 17C
Colt Anaconda — Colt Anaconda
McLusky .50 Caliber — IMI Desert Eagle
Braddock 9mm — MAC-10
Lassiter Killmatic — Uzi
Utica M37 — Ithaca 37
Jaegerspas XV — Franchi SPAS-15
Jaime Sue — Remington Model 700
Steyr Aug — Steyr AUG
Accidentally Correct Writing: Meta-example. In the French version of the game, there is a typo in one of Therese Voerman's lines (when you spoke to her after the "Slashterpiece" quest), in which there is written "Therese" where she would be logically speaking of Jeanette. Which actually makes sense. It could seem to be a clue unwillingly told (she was very upset at this moment, so she could have confused the names), foreshadowing the reveal that they are the same person, but it is actually really a mistake: the voice actress did say "Jeanette" and not "Therese".
Actor Allusion: When you get the briefcase for Fat Larry, he examines its contents and calls them "Beautiful." Larry is voiced by Phil Lamarr, who played Marvin in Pulp Fiction, and was connected to the briefcase arc of that movie.
Development Hell: Thanks to Valve wanting to show off the Source Engine on their own terms, the game was not allowed to be released before Half-Life 2, even though everyone already saw the engine a year previously thanks to the Half-Life 2 beta leak. Some would call that leak karma for them dicking with Troika.
Replay Value: Immense due to the fact playing a different faction of vampire changes the game noticable, with the Malkavian option nearly turning the entire game into a bizarro alternate universe. There are also numerous endgames possible depending who you ally with at the end.
Unusually Uninteresting Sight: After setting the explosives to blow up the Sabbat warehouse, if you go back to the trainyard, hide in the safe zone past the second set of tracks, and let the timer run out without stepping onto the platform (which triggers the cutscene with Beckett), the two guards chatting nearby (assuming you haven't killed them already) will carry on after the explosion as if nothing has happened.
At some point while walking around the streets of Downtown LA, you may hear gunfire coming from nearby. If you investigate, you find what appears to be a skirmish between two rival gangs. Pedestrians in the immediate vicinity will flee in terror, but everyone else will calmly go about their business, even to the point of casually strolling into the combat zone.