History WesternAnimation / DeadSpaceDownfall

** Multiple characters and their actions are omitted; this includes Dr. Challus Mercer and his experiments on Brant Harris, Elizabeth Cross trying to contain the Leviathan Necromorph in Hydroponics, Jacob Temple trying to keep the engineering crew together, Comms Officer Bailey implying Captain Mathius might have blown out the communications array, and [[spoiler:CEC Executive Warren Eckhardt's presence as a VIP-guest on the ship and co-conspirator of Captain Mathius in wanting the Marker brought back to the Church of Unitology]].

** Multiple characters and their actions are omitted; this includes Dr. Challus Mercer and his experiments on Brant Harris, Elizabeth Cross trying to contain the Leviathan Necromorph in Hydroponics, Jacob Temple trying to keep the engineering crew together, Comms Officer Bailey discovering Captain Mathius deliberately blew out the communications array, and [[spoiler:CEC Executive Warren Eckhardt's presence as a VIP-guest on the ship and co-conspirator of Captain Mathius in wanting the Marker brought back to the Church of Unitology]].

** The movie timeline runs much faster than is implied to have happened in the game; the game's audio logs suggest the SanitySlippage took days to manifest alongside the Necromorphs. Other differences include the Marker being much larger and the Necromorphs being unable to approach it. [[spoiler:Though that may be because it has use for Vincent.]]

* HeelRealization: After witnessing the effects of the Marker and the infection, Dr. Kyne realizes that the Unitology church had been lying to the ''Ishimura'' crew about everything. He then sets out to sabotage the ship to ensure the infection doesn't spread beyond the Aegis system.

** Vincent holds onto the hope that the crew can be saved long after it's obvious Kyne's got the right idea.

* LeeroyJenkins: For all her reason and rationality, Vincent does have shades of this, especially when she insists on sending her team to the surface of Aegis VII as the colonists are being slaughtered by Necromorphs. This kind of emergency would require a military intervention, while Vincent -- mind you -- is just a leader of a small, poorly armed security team on a commercial vessel, way over her head and with absolutely no idea what she's dealing with... but she's still utterly convinced of her ability to handle the situation. Captain Mathius seems like the ''reasonable one'' compared to her at that moment.

** Played straight with Vincent. She is the head of security on ''Ishimura'' and the only person (with possible exception of Dr. Kyne) who remains level-headed throughout the entire movie.
** {{Zigzagged|Trope}} with Captain Mathius. When he learns that ''something'' is killing the colonists on Aegis VII, he tries to prevent it from spreading to ''Ishimura'' and refuses Barrow's shuttle to land. While this decision may seem cold and ruthless, it is actually more sound than Vincent's insistence on helping the people on the planet's surface and those aboard the shuttle. However, Mathius's other actions -- like his obstinacy on delivering the Marker to Earth at all costs -- paint him in much less positive light and make him come off as a crazy fanatic.

* SanitySlippage: Affects some ''[[AxCrazy way]]'' more than others.

* TheUnReveal: It is unknown who is the person who jettisoned the ''Ishimura'''s escape pods as Kyne (who admits in the game that he was behind some of the ship's sabotage) is still in the room when it happened and Captian Mathias (who is presumed to be one who sabotaged the Communication Array) had just been killed. [[spoiler:The 2023 remake hints that Brent Harris was behind the sabotage under Dr. Mercer's orders and before he fully transforms into the Hunter]].

* WrongGenreSavvy: Vincent is this to a tragic degree. She insists on trying to help the colonists on Aegis VII when it is revealed they're being slaughtered, is eager to render aid to any survivors who might have arrived on the shuttle, and throughout the entire movie she remains convinced that she can still save ''Ishimura'' and her crew (thus [[NiceJobBreakingItHero botching Dr. Kyne's attempt at crashing the ship]]), although it's increasingly obvious that it is too late for that. In any other work of fiction, those actions would come of as reasonable and noble, but this is ''Dead Space'' movie we're talking about. So she only succeeds in making things worse.

* Foreshadowing: [[spoiler: For TheReveal at the end of the game. The Survey team that finds the Marker at the beginning of the film first find evidence of mining activity that took place at least 150 years earlier, implying that the current CEC mining operation wasn't the first Human settlement on the planet.]]

* AllForNothing: Vincent's sacrifice is rendered pointless because something, possibly the Marker, ensures her final log is too garbled to be understood by the crew of the ''Kellion''.

* AscendedExtra

* DangerTakesABackseat: While Colin was busy carrying the deceased Jennifer back home, he was unaware they had picked up an undead stowaway that went to work on her body while they flew to the Ishimura. As a result, Colin is attacked and killed by his newly infected wife just as they make it into the Planetcracker's shuttle bay.

* DangerTakesABackseat: While Colin was busy carrying the body of Jennifer back home, he was unaware they had picked up an undead stowaway that went to work on her as they flew to the Ishimura. As a result, Colin is attacked and killed by his newly infected wife just as they make it into the Planetcracker's shuttle bay.

** {{Zigzagged|Trope}} with Captain Mathius. When he learns that ''something'' is killing the colonists on Aegis VII, he tries to prevent it from spreading to ''Ishimura'' and refuses Barrow's shuttle to land. While this decision may seem cold and ruthless, it is actually more sound than Vincent's insistence on helping the people on the planet's surface and those aboard the shuttle. However, other Mathius' actions -- like his obstinacy on delivering the Marker to Earth at all costs -- paint him in much less positive light and make him come off as a crazy fanatic.

* UnusuallyUninterestingSight: Once Colin and another miner return to the colony, they find it trashed, with blood covering the walls and screams echoing in the darkness. Colin's response is to shrug it off and head home. It takes his wife committing suicide right in front of him for him to realize something's not quite right.

* OffModel: The health bars on everyone's [=RIGs=] are almost never consistent, let alone move down. Mathius' is a notable aversion to this, since we see his health meter quickly drop. Doesn't help that the movie used ''three'' animation studios during production (Creator/JMAnimation, with assistance from Creator/DigitalEMation and Creator/HanhoHeungUp).