Where life had no value, death, sometimes, had its price. That is why the bounty killers appeared.
— title card
For a Few Dollars More is considered as one of the greatest films of the Spaghetti Western, and a masterpiece of Sergio Leone. It is the second film in the Dollars Trilogy, A Fistful Of Dollars being the first and The Good, the Bad and the Ugly being the third. Even That Other Wiki named this film as an Epic Western. And no wonder, in fact, the intro theme, along with The Good, the Bad and the Ugly theme, is the most known and memorable in the Sergio Leone's Western films.The Man With No Name (nicknamed "Monco" or "Manco", respectively Italian and Spanish slang for "missing one hand", because he does nearly everything with his left hand in order to keep his right hand free to draw and fire) and Colonel Mortimer, a skillful bounty hunter, are both hunting the famed gang leader El Indio. The Man With No Name is motivated by money; the Colonel is motivated by revenge. After the two bounty hunters clash, they put aside their differences and team up to capture Indio. As part of their plan, Manco infiltrates Indio's gang by busting one of Indio's friends out of prison. However, the plan does not work out as hoped.
For a Few Dollars More provides examples of the following tropes:
Awesome, but Impractical: Col. Mortimer's Buntline Special. Its longer barrel gives Mortimer an edge in distance, meaning he can wait out of a pistol's normal range and line up shots, but that same long barrel also prevents him from quickdrawing it, a disadvantage in some of the situations he finds himself in. He carries a derringer up his sleeve for such emergencies. It was somewhat practical for those who preferred a pistol grip as opposed to the lever action.
Batman Gambit: Mortimer tells Monco to make Indio go north. He tells him to go south, even though Indio was planning to go north to begin with. Indio splits the difference and heads east. Naturally, Mortimer is waiting for them at their destination.
Best Served Cold: Col. Mortimer has spent years honing his skills as a bounty hunter, tracking down the bandit who murdered Mortimer's brother-in-law and raped Mortimer's sister until she committed suicide.
Bigger Bad: El Indio could be seen as this thanks to the two other sequels in the Dollars Trilogy, because as confirmed the authorities "is the worst criminal of all time", and considering that Angel Eyes and Ramon Rojo are monstrous, El Indio is definitely the worse one and influential criminal if the authorities agree.
Big Damn Heroes: As shown above on the page image, Clint Eastwood's Man With No Name character saves Mortimer by intervening in Indio's unfair Mexican standoff by providing a gun for him to use against the villain. With his gun trained on Indio satisfied that the odds have now been evened in his friend's favor he sits down and says, "Now we start."
Crapsack World: The title card sets the stage by declaring, "Where life had no value, death, sometimes, had its price. That is why the bounty killers appeared." The film was even called Death Had a Pricenote La muerte tenía un precio in Spain.
Dark Is Not Evil: Mortimer often dresses in black and is clearly the good guy when compared to El Indio.
Decoy Protagonist: Let's face it, this film is more about Col. Mortimer and his quest for vengeance than Manco.
Faux Fluency: Gian Maria Volonté, who played El Indio, couldn't speak a word of English, but supplied his own voice to the English version anyway, speaking the dialogue phonetically with the help of a translator.
Freudian Trio: Manco's the Ego, Mortimer the Superego, and El Indio a very crazed Id.
For the Evulz: El Indio's reason (or lack thereof) for torturing Manco and the Colonel, and for raping Mortimer's sister and killing her husband.
Functional Addict: El Indio may spend most of the film under the influence of opium, but he's still an efficient and threatening villain.
Heroic Comedic Sociopath: Manco and Mortimer shooting each other's hat away is played for laughs, and for gaining mutual respect, but Manco proves unable to hit Mortimer's hat after shooting it too far away, yet keeps shooting despite Mortimer picking up the hat. It's basically luck he doesn't hit Mortimer.
Hey You: The protagonists settle into a friendly rivalry of sorts, addressing one another as "boy" and "old man", respectively.
Improbable Aiming Skills: In the hat-shooting contest between Manco and Mortimer. Done a second time when Mortimer grazes Manco's neck with a bullet, so he'll have a convincing injury to back up his story when he meets up with Indio again.
Nostalgic Music Box: Two pocket watches, one belonging to Mortimer and the other carried by Indio, that play the same tune. The two watches originally belonged to Mortimer's sister and her husband. Indio stole one after killing him and raping her and uses the music to remind himself of the good time he had doing so.
Oh Crap: Manco gets one when, after climbing over a wall from a meeting with Mortimer, he steps on, and wakes up, one of El Indio's thugs. Mortimer follows, and gets one when he realizes Manco's not the one holding him up.
Quick Draw: Indio likes to challenge people he's captured to these; playing the Ominous Music Box Tune with its end as the cue to fire. He also likes to place whoever he's facing at a disadvantage, such as surrounding them with goons or removing their guns from easy access. It's only when Manco steps in at the end that he actually has to fight fairly. Also, Indio's heard the song a thousand times while his opponents have no clue when the music might end. This of course puts him on equal terms with Col. Mortimer.
Red Right Hand: The Hunchback, who is perhaps the most insane of El Indio's men.
Revenge by Proxy: Indio does this early on in the movie to a guy who took money to put him behind bars. The guy had used the money to start a family, and so Indio feels that the family is "partly his." He forces him to watch as his men take the guy's wife and baby boy outside and shoot them both to death, just before sadistically setting up a duel between them using the pocketwatch that he'd made him listen to during the whole thing.
The first villain we see adds two zeros on his own wanted poster, claiming it isn't anywhere near enough.
Colonel Mortimer also has a bit of a staring contest with El Indio's wanted poster as he shoots it with his mind.
Would Hurt a Child: El Indio ordering his men to kill a baby, setting the tone for how depraved he really is.
Why Don't Ya Just Shoot Him?: Sort of subverted, since Indio thought he would have profited from the bounty hunters killing off most of his gang (as he wouldn't have had to split the loot). Of course, it doesn't work out as well as he had planned.
El Indio's actor, Gian Volonte, also played Ramon, the villain in A Fistful Of Dollars. It can be somewhat jarring if you watch the two movies back to back. It could have been worse: Volonte was originally supposed to play Tuco in The Good, the Bad and the Ugly as well, but Leone later decided he wanted an actor with a natural comical talent.