Nice Day, Deadly Night

"The morning sun has vanquished the horrible night."

Imagine you're shipwrecked somewhere. At first glance it appears bright and cheerful, a pretty normal place. But then sundown comes and it's night, accompanied by a sudden flood of monsters who want to kill you. Apparently in this world all the deadly creatures are nocturnal, and usually also Weakened by the Light and the arrival of the sun.

Very common in Survival Sandbox games — usually you start off at sunrise and have until sundown to gather materials before night comes along with unwelcome visitors.

Most Cassette Futurism films (The '80s version of Cyberpunk) involve street gangs that have control of the cities and mostly come out at night.

Most cases of The Night That Never Ends will have at least minor levels of this in play.

Compare Darkness Equals Death and contrast Daylight Horror.

Examples

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    Video Games 
  • Alan Wake: During the daytime, life in Bright Falls is fairly normal. Once night falls, things get dangerous in a hurry, with Alan having to fight large numbers of shadowy Taken.
  • Interestingly, night itself in Don't Starve is deadly, and will slowly eat away at your health (represented by a monster you can't see) unless you go into an area that's lit up.
  • Dragon Age II has two separate sets of levels for the city of Kirkwall by day and by night: while the day levels are not completely free of violence, it is very uncommon to be mugged out in the open. Night levels, meanwhile, feature multiple gangs roaming the streets that attack passers-by without provocation.
  • The Elder Scrolls:
  • The Legend of Zelda:
    • In The Legend of Zelda: Ocarina of Time, being caught outside of Hyrule Town at night as young Link will cause the drawbridge to be raised (preventing you from entering) and cause "Stalchildren" to rise from the ground and attack if you step off the path. They aren't particularly strong (and have Super Drowning Skills), but they constantly keep coming until dawn (and every 12th one will be progressively larger). Day time does have the stronger Peahats which are almost as persistent but one has to stray much further off the path to provoke them.
    • The Legend of Zelda: Twilight Princess. During the day, Hyrule Field has enemies that can be seen from a long way off. Come night, they're replaced by skeletal hellhounds who endlessly respawn near the player and attack in packs.
  • Minecraft: During the day, the world is filled with passive animals like sheep, cows and pigs and neutral ones like wolves and polar bears, with almost nothing that will try to kill you unless you attack it first. However, hostile mobs like zombies and skeletons will come out during the night, and it will be quite necessary to have somewhere to hole up and plenty of torches to keep the dark at bay to survive. While most of the monsters will catch on fire and burn to death when dawn comes, one type — the explosive and hard-to-see Creepers — will not, in an exploitment of players' expectations that this trope will mean its safe to go out as soon as the sun comes up.
  • In the Pikmin series, the surface of PNF-404 can be dangerous during the day, but at night it's so dangerous that the Captains and Pikmin enter low orbit to avoid the predators that become active at that time. Any Pikmin left behind who aren't in the ground are devoured by the native wildlife.
  • 7 Days to Die has zombies which are much more difficult to deal with during the night compared to day.
  • In Slime Rancher, Phosphor Slimes only spawn at night. They aren't dangerous on their own, but when three or more types of slime are present in one area there is a risk that a Tarr outbreak will occur.
  • Starcraft II: One mission has you surrounded by buildings that spawn infested Terrans, who burn in the daylight due to the star's high UV output. They attack in vast hordes as soon as it gets dark, and the player is meant to attack with impunity during the day, but there's an achievement for attacking at night (Reapers. Lots and lots of reapers). The official map Left 2 Die takes this concept and adds Left 4 Dead-inspired bosses.
  • In Stardew Valley, if players pick the wilderness farm monsters will spawn at night. You can also toggle monster spawns at the farm if you offer a strange bun at one of the Witch's Shrines.
  • In Terraria it's actually dangerous during both day and night, but night, which has zombies and flying eyeballs, is significantly more dangerous than day, which feature slimes that tend to do just Scratch Damage.
  • While Gensokyo in the Touhou series is fairly dangerous to outsiders at any time of day, youkai tend to be most active at night, and leaving the Human Village at that time is more or less taking your life into your own hands if you don't happen to be a protagonist, as it's automatically assumed that you know how to defend yourself.
  • Warcraft III:
    • Inverted in the case of most neutral monsters which sleep at night, making it easier to approach them. However, some turn invisible and remain awake, turning a Curb-Stomp Battle against a few monsters into a sudden ambush.
    • Inverted for the Night Elves, who fight much better at night than in the day, being able to turn invisible and slowly regenerating.
  • The first The Witcher game has a day-night cycle, and while some monsters roam out in the open during the day, the vast majority come out at night. This is especially noticeable in the first act, which takes place in and around a small village surrounded by woods, but happens even in Vyzima, a capital city, later on.


Non Video-Game Examples

    Anime and Manga 
  • Blood-C: Daytime in Saya's hometown is relatively peaceful and Saya is usually doing her daily routine as an Ordinary High-School Student. At nighttime, she goes out to hunt and kill Elder Bairns. This pattern is broken around Episode 5 where the Elder Bairns come out during the day too and attack several civilians. This also led Saya to bring her katana in school.

    Comic Books 
  • In DC Comics, Batman's birthplace and HQ, Gotham City, is shown as a deadly city mostly by night, which is the moment when the Caped Crusader defends the city from threats ranging from thugs to supervillains.

    Animated Films 

    Live Action Film 
  • Aliens: After the drop ship is destroyed and the protagonists are trapped on the surface of the planet LV-426, Newt warns Ripley about the deadly threat the xenomorphs will pose to the Colonial Marine force once night falls.
    Newt: We'd better get back cos it'll be dark soon, and they mostly come at night. Mostly.
  • I Am Legend: The last human resident of New York, Robert Neville, is free to roam about during the day with his dog and do whatever he wants in the abandoned city. But at night, he has to board in his house, cover up his scent, and securely seal every window and door, lest the Darkseekers, who can only survive in the dark, come to kill him.
  • Pitch Black. Survivors of a starship's crash landing discover that the deserted planet they're on has three suns, resulting in almost constant sunlight. When a prolonged total eclipse occurs, they are swarmed by deadly alien monsters in the dark.
  • The world of RoboCop is pretty horrible at any time of day, but night is when the roving street gangs are at their most active.

    Literature 
  • Beowulf : the titular hero's first enemy is Grendel, a monster that attacks each night before slinking away come morning.
  • H. G. Wells' sci-fi story The Time Machine has the Time Traveler journey several thousand years into the future, where he meets the Eloi, small dwarfish people that amble about the remains of civilization by day. At night, however, the Morlocks ascend from the depths of the Earth to harvest some of the Eloi. Though the Traveler is significantly larger than any Morlock, he's aware that he'd fare poorly against a Zerg Rush.

    Tabletop Games 
  • Advanced Dungeons & Dragons, Ravenloft campaign setting. Ravenloft is based on Gothic Horror, so as you'd expect the night is always more dangerous than daytime.
    • 1st Edition module I6 Ravenloft. At night, the citizens of Barovia bar their doors and tremble in terror. Strahd attacks the PCs at night with wolves and bats. Not only could the attacks easily kill them, but party spellcasters can forget relearning their spells. Random encounters at night are much more dangerous: not just wolves, but a deadly variety of undead monsters.
    • 2nd Edition Domains of Dread supplement. In the domain of Kartakas, wolves roam the streets of the cities at night and are strong enough to break down barred gates.

    Western Animation 
  • Gargoyles: Since the title characters turn to stone in daylight, most of the series actions take place at night. The tour part episode "City of Stone" played this up even more by having Demona curse the human population of New York to turn to Stone during the night in the same manner as the gargoyles do during the day. At one point, she even takes the time out to smash two of the statues.
  • Kubo and the Two Strings: Feudal Japan is friendly and normal enough in the daytime, but come night, Kubo's grandfather the Moon King and his daughters (Kubo's aunts) are out to get him, in ways that are often deadly.
  • The Simpsons: Parodied in "Lost Verizon"; Bart is left home alone and becomes afraid of nature at night, resulting in an Overly Long Gag of Bart afraid in the dark and happy in the day ("Night is scary." "Day is awesome!")

    Real Life 
  • Many large predators such as big cats tend to be at their most active at night, which is also when our human day-adapted vision renders us at our most blind, helpless, and disoriented.
  • Many a military offensive has used the cover of darkness to mask its approach.

http://tvtropes.org/pmwiki/pmwiki.php/Main/NiceDayDeadlyNight