Continuity mistake: Achilles runs up the stairs of Apollo's temple, kills some men, including one after he runs up the stone base of the gold statue. He then turns around, with the two blades in his hands, to be face to face with a Trojan whose helmet is all askew and Achilles pushes the tips of the blades into the center of the soldier's chest armor. At the start of the very next shot the man's helmet is perfectly straight, and Achilles' two blades are conspicuously not in the soldier's chest, both are clearly visible at the soldier's side, under his left arm (NOT in his chest), already bloody, with the dripping blood stain on the center of his armor where the blades should be. Then Achilles pulls the blades 'out of' the soldier accompanied by the dramatic sound effect.
Deliberate mistake: When Achilles reaches the bottom of the stairs of Apollo's temple a Trojan pulls on Achilles' spear so he elbows that Trojan in the face, then turns and slices another one. When Achilles turns around he is face to face with a particular Trojan, who has two decorative clasps in his long hair, then he slices him across his face and he falls. In the next shot he fights another couple of Trojans. The following shot is the exact same shot as the previous one with the Trojan, who has two decorative clasps in his hair, that he proceeds to slice across the face again.
Deliberate mistake: Stable gates never open inwards. In two scenes after Achilles leaves the solder alive during the ravage of Troy, they do. This is probably because it is visually effective when soldiers kick gates from the outside to open them. Stable gates in all cultures open outwards so that in case of fire the animals can't block them.
Audio problem: When Hector is giving his speech to the Trojans as they stand outside the gates in face of the oncoming Greeks, he gives his final line of the speech and there is a rousing cheer from the soldiers. However, none of the soldiers move in any way in the wide shot.
Continuity mistake: As the ship heads toward Troy's shores, Eudorus walks toward Achilles at the bow. There is a close-up of his feet as he passes many spears, helmets, swords, armor and shields lying on deck, and in the next shot many of the items on deck are either gone or positioned differently, and the shadows that are cast significantly change between shots, while Achilles and his Myrmidon are aboard their ship.
Continuity mistake: In the scene near the start of the film where Achilles ship has just arrived on the sands of Troy, the ship gets fired upon by flaming arrows. The camera cuts to a shot aboard the ship where you can see a soldier jump over the side, his shield and spear on his right arm. Yet when he lands the shield and spear have switched to his left arm.
Continuity mistake: Paris drops his sword, and it falls flat on the ground. Then after Menelaus dies, the position of Paris' sword on the ground changes from when he's running to get it, where the blade points more towards the Trojan army (ie. roughly horizontally in his path), to when he finally grabs hold of it, where the sword leans up a bit on its side and the blade points distinctly towards the Greeks (ie. directly away from him).
Continuity mistake: When Hector comes through the gate and confronts Achilles, the area around the two chariot wheels is clear. In subsequent shots large clumps of dirt and grass are in front and back of the two chariot wheels, which changes significantly throughout the rest of the scene, as well as the position of the wheel spokes.
Continuity mistake: As Achilles and Patroclus sword play in Phtia, at the bottom of a particular area with stairs, in the first shot after the first close-up of the horses' hooves, there are large clumps of greenery at the corners of these individual stairs. However, when Odysseus speaks with them and says, "My wife will feel much better if she knows you're by my side..." now some of the clumps of greenery are gone from the stairs, and there is a water 'canteen' on the third step, which Achilles drinks from. There are a number of significant differences among surrounding shrubbery and small rocks, including from the opening aerial shot, and the sun's shadow changes drastically during this entire scene.
Revealing mistake: When Briseis sticks the knife in Agamemnon's neck, you can plainly see silver fillings in his teeth when his head is back.
Continuity mistake: When King Priam, Hector and the elder people are arguing about what to do about the Greeks, in the front view Hector is standing in the center of the edge of the pool of water, but when Priam stands up the shot changes to a back view and he is standing near the corner instead.
Audio problem: When Agamemnon and the Greeks are retreating, Odysseus shouts, "Back to the ships!" in a close-up while he rides with Agamemnon on his chariot, but his mouth is not in sync with the words; nor is Agamemnon's when he shouts the same in the previous wideshot (not his close-up).
Continuity mistake: When Ajax walks to the bow of his ship, the men in front of him are standing spread apart. However, in the next shot when he pushes the two men apart, they are very close together.
Continuity mistake: After Agamemnon dies, Achilles helps Briseis up and his greave wrapped right leg (which is visible) is upright against her, as he says, "Come with me," and then is hit with the first arrow. In the close-up of Briseis, as she shouts, "No!" just as Paris prepares to fire the second arrow, Achilles' right leg with its greave and straps are once again perfectly visible beside Briseis, but the way the right greave and straps are wrapped are entirely different.
Visible crew/equipment: Paris releases the first arrow, after the Greeks break through the palace gate, and when the Greek soldier turns around, a piece of equipment is visible on the floor, as the Trojans move forward in this shot, (similar to the equipment at the stairs in the earlier shot).
Continuity mistake: When Achilles ties Hector's feet with the rope, the excess rope at the knot and the length of the rope between the chariot and Hector's feet changes while Hector's body is dragged by the chariot. In the first wide shot, as Achilles begins to drag him, its length is twice as long than in the following close-up.
Continuity mistake: When Paris pulls the first arrow from his quiver and releases it into Achilles' heel, the shaft's wood color is very light (whitish). However, in the close-up of the arrow in his heel, the arrow shaft is dark wood (brownish), then in all of the following shots (including when he dies) the wood is very light again.
Continuity mistake: As Briseis stabs Agamemnon in the neck, a particular part of his neck is visible in the first shot once the blade is in, just before he grabs her wrist. In the shot facing Briseis, the turned handle in her hand is further back on Agamemnon's neck than it should be to make the clean, straight, vertical wound below his ear. When she pulls the blade out, the wound is also positioned in the area that was visibly clear of the blade in the first shot.