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->''"''Gantz'' is [[RefugeInAudacity quite possibly the most offensive anime you can get]] outside of the {{hentai}} section. Certainly it's the most transgressive made-for-TV anime to emerge in recent memory..."''\\
--'''Dan Barry''' of animeondvd.com, from [[http://www.mania.com/gantz-season-1-complete-collection_article_77864.html this review]]
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%% One quote. Extras go on the quote tab.

Right. Imagine the bastard offspring of ''Manga/ElfenLied'' 's wanton gore and nudity with ''Anime/NeonGenesisEvangelion'' 's disturbing nature and outright insanity. Then [[ThisIsYourPremiseOnDrugs put that on crack and toss it in a septic tank]]. That's ''Gantz''.

''Gantz'' is a horror/sci-fi series by Hiroya Oku. As it begins, Kei Kurono, [[JerkAss a rather unpleasant]] teenage student, is run over by a train after he and his childhood friend Masaru Kato rescue a hobo from the rails. Instead of being dead, suddenly Kurono finds himself trapped in a small apartment along with Kato, a bunch of weird people (including a hot naked girl, a dog, and a middle-school boy who seems to be the only one who knows what's going on) and a large black sphere.

The sphere names itself Gantz, sings an exercise song, and explains the situation: They were dead, but Gantz needs them for the mission of killing a weird alien creature (the first of a series, as it turns out). The rules are easy: They have one hour to complete the assignment. If they are hurt but alive at the end of the time, they are fully healed, but if they are killed they'll remain dead. If they get too far outside the hunt area they will die. Their performance will be measured for points; when they get 100, they can be free. With all that said, Gantz gives them high-tech battle suits and some futuristic equipment and armament, and launches them into the mission.

Then giants invade Earth after about 300 chapters...

Essentially, the first nine volumes (and the whole anime series) consist of senseless killings; gory, horrific violence; {{Fanservice}}; and sex scenes. Then, [[GrowingTheBeard the manga began to improve]] when Kurono was given a romantic interest and an impressive CharacterDevelopment. And then, "vampires" are introduced, some secrets are revealed, and things become truly weird and extremely convoluted. The fights also become longer and longer, to the point they seem interminable.

In the manga's third and final phase of the story, things all over the world [[FromBadToWorse become horrifically worse for everyone]]. Oku had planned to end the story in 2012, but it ultimately wrapped up on June 15, 2013.

A two-part live action Japanese movie adaptation was released in the winter and spring of 2011.

----
!!Tropes;

[[foldercontrol]]

[[folder: Multiple Version Examples]]
* AlasPoorVillain: Nishi and Izumi both get touching deaths.
* AbortedArc: The plot points involving the real Kishimoto's survival and the vampires fighting back against the Gantz players ultimately don't go anywhere.
* TheAbridgedSeries: ''WebVideo/GantzAbridged''
* AbusiveParents: variation. Kato's younger brother is abused physically and sexually by his aunt.
* AbsurdlySharpBlade
* ActionGirl: Some of the female Gantzers. Reika definitely qualifies, as does Anzu Yamasaki [[spoiler:from the Osaka team]]. Even Kishimoto got some moments. Sei Sakuraoka is a tremendous secondary character example.
* AdaptationDistillation: In the anime, Nishi [[spoiler:killed himself by jumping from a building rather than being thrown by his classmates.]]
* AliensAndMonsters: The enemies that the team members are forced to fight.
* AliensAreBastards: Played with. Most aliens seem to just be "there", not causing much trouble for humanity until the Gantz team tears up their shit... but then many become violent, sadistic assholes as soon as they can, and sometimes it's not as if they were completely harmless before being targeted for extermination (the Oni aliens for instance are basically a large gang of thugs, who based on their dialogue probably committed their share of mugging, beating and raping humans). [[spoiler:Then in the manga the giant four-eyed aliens come along, and do things like indiscriminate planetwide mass-slaughter, harvesting and snacking on humans in viciously sadistic ways... and happen to be physically and psychologically [[HumansAreBastards the most human of all aliens]].]]
* AnyoneCanDie: Twice, even, if you're a Gantz participant. [[spoiler:Sometimes more.]] The manga's last phase extends this to [[spoiler:'''''THE ENTIRE HUMAN SPECIES.''''']]
* ApathyKilledTheCat: The characters could be noticing details pertinent to their survival, but they're too wrapped up in personal crises dealing strictly with their own feelings and desires.
* AssholeVictim: Well, you usually don't feel very sorry for all those yakuza guys, bandits and rapists when they're slashed by aliens.
* AttackOfThe50FootWhatever: starting from the Buddha Temple Mission.
* AttemptedRape: It happens to Kishimoto soon after she's introduced. Also, Reika [[spoiler: by cloned Kurono, except she was in love with him anyway...and had actually invited him into her bed that very night. The realization sort of kills his appetite and he backs off.]], and Tae.
* AuthorAppeal: If you don't see a naked or virtually naked female and/or a sex scene once every 5 or so chapters, you're reading the wrong series. That being said, the only sex scene with [[spoiler:the real Reika]] was tremendously modest.
* AwesomeButImpractical: The guns in the series, while extremely powerful and more than capable of beating the targets, take absolutely ''forever'' for their fired shots to reach their targets. Even then, there's a time lag before the ammo finally decides to explode. Of course, it's not like the hunters have any other weapons, so what choice do they have? Subverted in the last hunt in the anime, where the timelag was removed on the guns, making them far more deadly.
* BackFromTheDead: Scoring 100 points allows you to bring someone back from the dead. In the manga, this actually gets used to bring back a few of the dead Gantzers, including [[spoiler: Kato, Nishi, and Kurono himself]]. In the movie, [[spoiler:Nishi]]'s dying wish is for someone to get 100 points and bring him back.
* BadassNormal: Quite a few characters.
** Daizemon Kaze. In his first mission he ''beat a friggin' dinosaur'' to death ''without the suit''.
** Kurono qualifies very quickly for this any time he's put in a situation where he lacks his suit. He freaks the hell out about it every time (because the suits increase the odds of living ''greatly'') but still manages to live through battles.
*** In the manga, Kurono later qualifies again when [[spoiler:he manages to kill over a dozen vampires lacking both his suit ''and'' his memories, having opted to take the choice of leaving the Gantz team.]]
** Reika also qualifies in a later chapter, as [[spoiler:she manages to jump from 0 points to 100 in a single mission, making her the first main character to reach 100 points twice. This becomes even more apparent when you notice most of the team didn't even get a single point.]]
* BaitAndSwitchBoss / TrickBoss: Several missions feature these. The wimpy Onion Alien that was on the readout in the first game had a much bigger, ''much'' more dangerous teammate (his father, by the way, in case you missed that). Half the team was dead before it was done. The Buddhist temple mission is another excellent example. Also, the "Mr. Tanaka" aliens, which are nothing more than [[spoiler:minions/kids]]. The Dinosaur Arc sort of subverts it when Gantz identifies the "Boss" from the beginning, then played it straight when the boss grows from the size of a kid to a giant humanoid creature, and even then he is not nearly as dangerous as the final dinosaur in that mission.
** And the final bosses are not related to the game much.
* BathSuicide - Kishimoto; subverted, however, as [[spoiler: she actually survives, causing complications later.]]
* {{BFG}}: Considering what they do to their targets, all of the weaponry could qualify, but especially the huge guns used by the Osaka team and the H-Gun.
* {{BFS}}: The katana from Gantz arsenal that can alter its length to ridiculous levels. It was once used to slice [[spoiler:a dinosaur in half. Vertically]]
* BeautyIsNeverTarnished: Unless you're Reika.
** Or [[{{Bishounen}} Host Samurai]].
* {{Bishounen}}: Early on a model, Masanobu Hojo, whom Gantz called "Homo", then Izumi, "Host Samurai", Akira Kurono and Kyou of the Osaka team.
* BlindingBangs: [[{{Ringu}} "Sadako"]], the creepy girl, until she takes a more active role. Then she gets PeekABangs, then her face is fully revealed. [[spoiler:...aaaand then she gets killed.]]
* BloodSport: These are essentially what the alien hunts are all about.
* BloodyTropes: The series prominently features BlackBlood, BloodFromTheMouth, BloodSplatteredInnocents, BloodyHilarious (sometimes), BloodyMurder, FirstBlood, HeroicBloodshed, HighPressureBlood and RainOfBlood.
* ButtMonkey: Kurono's classmates think he's a "Daytime Lantern", i.e. completely worthless, and generally treat him like crap. One of the highlights of this is when an old bully brags to Kurono's face about how he scored the girl Kurono had a crush on when they were younger.
** His name actually ties in nicely to the fact that his second life, as a complete badass, happens during the night. Then during the day he's just plain old Kurono.
** Inaba within the Tokyo Team. If being tricked into [[spoiler:doing a ''male'' alien disguised as his crush Reika and ''getting seen by the real Reika'']] doesn't suck...
* CartwrightCurse: No wonder [[spoiler:Katou]] prefers to cultivate his [[RomanticTwoGirlFriendship romantic]] bonds with his best friend and {{True Companion|s}}.
* CatchPhrase: Gantz: "The new morning has come!"
** "Woah, it's Reika!"/"She looks like Reika!" - wherever the Tokyo team is seen by others, you're guaranteed to hear this. In the Gantz room. During a mission in another city. [[spoiler:During the end of the world]]. From the ''aliens''. Italy's seemed to be the only place free of Reika's fans thus far.[[spoiler: Or maybe everyone there is pretty much too dead to care about her.]]
* CharacterDevelopment: Kurono changes from [[JerkAss a perverted teenager who only helps someone to save face]] into a [[TookALevelInBadass powerful leader that inspires others to keep living]].
* * CharactersDroppingLikeFlies: [[AnyoneCanDie Everyone is fair game in]], and since its a DeadlyGame we're talking about here, there's always going to be a good bunch of (named) players around to be killed. Also, [[DeadToBeginWith since the players end up in the game by dying in the first place]], many (or most) of them get to die more than just once. [[spoiler:And then the protagonists start to run into [[WeAreTeamCannonFodder other teams with equally named and expendable characters]]... ''[[UpToEleven and then the war starts]]'']].
* TheChick: Kishimoto, early on.
* CloningBlues: [[spoiler:All of the hunters are duplicates created just before the death of the originals. Sometimes the original actually survives - just ask Kishimoto.]] Things get even more interesting when [[spoiler:Reika revives a third copy of Kurono when the second is still alive (the first clone of him has been killed earlier on)]].
* ClothesMakeTheSuperman: Without their suits, the "hunters" are nothing more than normal humans with guns that have a long delay between impact and effect.
* ClusterFBomb: The English dub and the subtitles of the anime. Gantz tends to curse every other line in the manga.
* ComplainingAboutRescuesTheyDontLike: When Kato rescues a civilian and his family from a youkai alien, the man upbraids him for initially hesitating. Also, many of the civilians that Kei rescues during the giant alien arc criticize him for not doing more for them.
* ConspicuousCG: the Anime and Manga have their share of it:
** The anime is more modest about it, and features only a few locations and aliens modeled in 3D. The CG at the Buddhist Temple mission is most notable; both Gate Guardians and the Living Armor are mostly in 3D, and a few shots of regular 2D animation make up the interim.
** The artist obviously produces the graphical representations of all weapons in the manga and a good deal of the technologies using 3D modeling. He then applies varying levels of 2D art and other post-production refinements over those models, to make them fit in better with the general art style. (The artist even details the process by which he does this in an early chapter.)
*** In later chapters, Hiroya Oku increasingly employs 3D modeling on top of real photographs to portray scenes of destruction, to the point where on some pages it [[http://www.mangareader.net/97-34409-2/gantz/chapter-304.html entirely dominates the scene]] and hand-drawn art stands out as perverse kind of ConspicuouslyLightPatch. This technique would lead a reader unfamiliar with the manga to become confused, as the scenes of destruction look like an entirely different comic.
* CreatureHunterOrganization: Gantz is a DeadlyGame where the players are equipped with alien technology and sent to destroy aliens of various shapes and sizes hiding on Earth. The players' equipment includes [[PowerArmor special suits that give the wearer superhuman strength]], [[AbsurdlySharpBlade absurdly sharp]], blade elongating [[KatanasAreJustBetter katanas]], and guns that shoot invisible, {{Painfully Slow Projectile}}s powerful enough to turn their target into LudicrousGibs. Later it's revealed that [[spoiler: the purpose of the game is to train soldiers capable of fighting an upcoming AlienInvasion by a race of giant-sized aliens. The technology used by the players comes from aliens previously attacked by the invading alien race, sent to Earth out of simple spite]].
* DavidVersusGoliath: Any human vs giant battle.
* DeadlyGame: The truth behind Gantz.
* DeadpanSnarker: Gantz himself.
* DeadToBeginWith: Somewhat true. [[spoiler:While Kurono and the other players are technically alive, they're only clones with the same memories as the original people, not the original people themselves. In other words, Kurono really ''did'' die on the train platform along with Katou at the beginning of the series. Hell, we even see Katou and Kurono's ''severed heads'' flying through the air before they're taken.]]
* DeathByDisfigurement
* DeathBySex
** [[spoiler: Sei Sakuraoka]] is killed the mission after she joins and has sex with [[spoiler: Kurono]]. To be fair, ''most'' people died that time.
*** Partialy subverted [[spoiler: since the only one who did survive that mission was the guy who had sex with her.]]
** Kuwabara Kazuo, one of the members of the Osaka team is so sex-crazed, that he decides to rape the Nurarihyon's giant feminine form as some sort of goodbye ritual when it's obvious he's about to die. Despite having his arms and legs melted down by the alien, he does manage to survive when the monster, [[spoiler: repulsed by his sperm]], spits him out and Kato orders Miho and Sumiko to carry him away.
* DeathIsCheap: Both played straight and subverted. Dead players can be revived at the cost of 100 points, but ''getting'' 100 points is about as far from "cheap" as Reika is from flat chested.
* DeathSeeker: [[spoiler:Kurono, briefly, as the first stage of his TookALevelInBadass transformation.]]. Widower Occhan (Gramps/Old Man), who doesn't seem to mind either way, anxious to rejoin his lost wife, but still in the fight for his pride and his friends. Not fearing death, he is unwilling nonetheless to accept a meaningless one. Also, he seems mesmerized by the can-do possibilities of the suit and playing TheLancer to Kurono's lead, putting his death-seeking on hiatus.
* TheDeterminator: Kato became one trying to be more like Kurono. Kurono became one trying to be more like Kato.
* DidYouJustFlipOffCthulhu: After successfully rescuing a lot of humans from the giants and scoring their first real victory, the Gantzers take a group whiz (yes, even the females; it's technically possible, though it can be messy if you're not careful) into the same tanks that were used to decontaminate them like animals. The only way it could be more awesome is if they were whistling the "New Morning" theme as well.
** Cthulhu kept a grudge. And responded promptly and explosively.
* DirtyCoward: Nishi and Inaba.
* DrivenToSuicide: Kishimoto ended up in the game after slitting her wrists in her bathtub. Sakurai also was on the way to this, changing his mind when Sakata showed him another resolution.
** in the anime, [[spoiler: Nishi]]
* EverybodysDeadDave: After [[spoiler:the Buddha alien mission, Kurono]] is the only team member left alive.
* {{Expy}}: [[http://images2.wikia.nocookie.net/__cb20081107172425/gantz/images/thumb/f/f1/Sei.jpg/276px-Sei.jpg Sei Sakuraoka]] of [[Franchise/TombRaider Lara Croft]]
* EyeScream: Nishi, by a "Mr. Tanaka" alien.
* {{Fanservice}} - Copious amounts of nudity and sexual material in the actual story. Also, see {{Stripperiffic}} below.
* ForgottenSuperWeapon: An entire armory of them.
** While they are not exactly super weapons, the {{Teleport Gun}}s are extremely useful, being a HitScan weapon, while all the other types of guns have a delay between pulling trigger and stuff blowing up. They are used only two or three times in the entire manga, mostly by Kato.
** Also, the Monocycle, which provides great speed, mobility, has extra seat for a shooter and can crush lesser aliens; it was used exactly once by Kurono's team.
** The cloaking devices, too -- the few times they use them, they're shown to be unbelievably effective (even against the vampires, who have ways of detecting you while cloaked), but most of the time everyone just seems to forget they exist even though there's no logical reason to ever be uncloaked during a mission. It's probably not a coincidence that the two characters who we're told survived long enough to be veterans, Nishi and Oka, actually do spend nearly all their time cloaked during missions; nobody else seems to catch on.
*** Well, not being able to see your own teammates can be a pretty significant disadvantage, so there's ''that'' reason to be uncloaked. They still don't use them nearly as often as they should.
**** Cloaked players see all other cloaked persons in their field of vision. Seen in Tae mission when they actually manage to fight each other on the alternate frequency... However, only guy to die for being seen got photographed while switching frequencies somehow, and his head exploded. And, also, it seems real world vision is significantly diminished/darkened when stealthed.
* FrickinLaserBeams: The Thousand Arm Buddha statue's weapon
* GagBoobs: Kei Kishimoto. She's not too happy about that. Gantz, who tends to give players unflattering nicknames, refers to her as "Tits" (and while the portraits it displays of most players are just stylized representations of their faces, the one of her includes a substantial portion of her boobs also). Also, Gantz likes to mock the well-endowed Reika, whose breasts get bigger ''during the series''. [[spoiler:Her rack actually saves the team from getting killed; see MexicanStandoff below]]. And then there's Sei, who's a [[Franchise/TombRaider Lara Croft]] {{Expy}} with all that implies ... you know, it might actually be easier to list the named female characters who ''don't'' have GagBoobs.
* [[TheComputerIsACheatingBastard Gantz Is A Cheating Bastard]]
* {{Gorn}}: ''Gantz'' is a prime example.
* HelloNurse: Kei Kishimoto had a bit of this going (read:everyone wanted to rape or harass her), but add the fame to [[strike:the boobs]] the beauty, and you have Reika. Everybody's fapping over Reika, fortunately except most of her teammates, who're too young, too old or too outstanding, so it's not causing major problems...until Reika herself fell for Kurono and discovered she cannot have him, which made her ''very'' frustrated.
* HeroicBSOD: Kato. In the early segments, every time he's faced with a choice to take the shot, he immediately breaks down. In the Buddhist Temple mission in the anime, the team happens across a dead bum and Kato decides that immediately after telling everyone they need to hurry and finish the mission is the perfect time to take yet another angst break. Kurono, who's presumably ''even more'' fed up with it by now than the audience is (which is saying something), angrily calls him out on it.
-->'''Kato''': [half a minute of carping and moaning, ending with ...] a place where innocent human beings get their heads bashed in for no reason at all!
-->'''Kurono''': Kato, ''get a fucking grip!''
* HeroicSacrifice: Kishimoto [[TakingTheBullet taking the acid attack]] meant for Kato. Far, far later in the story we have [[spoiler:Sakata]] saving most of his teammates in that manner.
* HollywoodAcid: used by the Thousand Arms Buddha statue to horrifying effects. Kind of justified, since that corrosive substance might not be form Earth at all.
* HollywoodTactics: And how! In many instances, the Gantz team display an odd kind of MookChivalry, refusing to gang up on a single powerful alien. Very early in the manga, in the Buddha Temple Mission, a character suggested the sniping tactic, and applied it effectively, yet that tactic was forgotten until the Osaka arc [[spoiler:; although to be fair, everyone except Kurono died in that arc, so he was probably too traumatized to remember it]]. Nevertheless, the team never think of distracting the aliens from multiple directions with cover fire. Also, Kato never thinks of firing a kill shot after successfully trapping an alien with the gun that fires cables. He just kind of stands there waiting for the thing to break free. And let's not start on how many Gantzers gladly walk within striking distance of the aliens instead of just shooting them.
** You remember the Oni Monster Arc? The one that Evolved? Yeah, they sniped him, all of them.
** They also have a habit of entirely encircling aliens at close range before shooting at them, which is a terrible idea since it not only puts them all in reach of enemy attacks, but also raises the risk of friendly fire.
** Also, they have ''invisibility cloaks'', but almost nobody but Nishi ever thinks to use them. Worse, the few times they do get used, it's heavily emphasized how overwhelmingly effective an invisible attack is. They don't even think to use their cloaks against an enemy that can explicitly only be killed by surprise attacks!
* HopelessSuitor: Kurono to Kishimoto in the beginning and Reika to Kurono later on.
* HumansAreTheRealMonsters: The aliens all seem to be minding their own business when the characters come tearing through in a storm of mass-genocide. Even a few of the aliens themselves point this out from time to time; [[spoiler:The final Buddha boss]] even eats a Gantzer's brain in order to ask Katou why they've been tearing up their shit. Most of the Osaka team embodies this trope.
** The giants are basically 4-eyed, supersized humans who like to [[spoiler:have earthlings as snacks]].
*** Also a case of NotSoDifferent one of them has a typical human teenager discussion with her mother.
** There's an entire episode devoted to monologues on humans being bastards.
* IdiotBall: Whenever someone is in a life-risking battle with civilians, it is the ''law'' that someone who is both significant and useless must stand in the way of the enemy. [[spoiler: Tae, Izumi's girlfriend, we're looking at you.]]
** Sometimes this is just because the early aliens are InvisibleToNormals.
** It's also a law that Gantz teams must at all times demonstrate they have ''no'' grasp of tactics. "Hey, everyone, we have long range weapons and most of our enemies are melee only! Let's form a circle around him at close quarters and stand around for five minutes thinking things over before shooting at ''the guy in the middle with our teammates right behind him'' with our ''delayed effect guns''!" Somehow they nearly always manage to avoid what ''should'' be the natural consequences of this. The ''one time'' somebody decides that sniping from cover might be useful, they face the one enemy in pretty much the entire series that has an effective (fast, accurate, deadly) long-range weapon, and of course since it didn't work out so well that time, it must be a ''horrible'' idea that should ''never'' be revisited again, even when they're back to facing melee-only enemies.
* IneffectualLoner: Nishi and Izumi, among others.
* InformedAbility: Nishi may very well qualify as this. He has been Gantzing for a year longer than Kurono & co., but [[spoiler:dies shortly after the beginning of the story without getting much of a chance to show that he's a skilled player. Even once he's later brought back, Nishi gets his ass handed to him by the Nurarihyon alien and loses an arm before being teleported back.]] It's tough to say whether or not he really deserves the title of 'Gantz veteran' when most of his scenes have been devoted to showing him getting curbstomped.
** It should be noted that Nishi apparently spent lots of his time hiding and kill-stealing when his prey was distracted by other Gantzers, and hardly ever fought on his own, hence the crappy fighting skill. Besides, he has been Gantzing for one year, yet has not been freed, has no special weapon whatsoever, and reviving someone else really is not his style, so one can be almost 100% sure he has never accumulated 100 points. On the other hands, the new players (Reika and such) get 100 points in just over a month. Thus, it is probably safe to assume that the aliens he has been fighting on his first year are pretty wimpy and not worth much points [[spoiler:or he just hid when the aliens were too much for him, choosing to get his points wiped rather than risking his life]], so obviously he gets his ass kicked a lot when faced with increasingly dangerous opponents.
**** Reika is the team's highest scorer, bar none (Izumi with his two wins being long dead...and having taken longer). Kaze and Sakata are rather superhuman even before death and the Gantz. And Gramps is the leader's wingman, getting lots of support help and advice..."Normal" new players all die right away, or at best score like Inaba (beaten by a toddler and a panda both).
*** To be fair though, he earned 100 points in the short Italy arc where ""Kurono"" of all people didn't score a single point, so he can't be completely useless. Besides, it's been fairly well established that the Nurarihyon is just about the hardest individual enemy the hunters have ever faced, given that it single-handedly wiped out the entire elite portion of the Osaka team along with putting the majority of the Tokyo team out of commission by the time of its demise. Getting your ass kicked by a 100-point monster isn't all that much to be ashamed of.
** Wrong and Wronger. Nishi topped off from 75 existing Osaka stealth points kill-poached and cherry picked in that chaos... Reika was the one who got the full hundred in one. Kurono seemingly scored a lot, either 90 something or maybe a full hundred, unknown due to counter failure from glitchy Gantz.
* InnocentAliens: There are several.
* InvisibleToNormals: For all of of the anime and most of the "first phase" of the manga.
* {{Irony}}:
** The "Morning Sun" song played in some of the grimmer moments of the anime fits this trope perfectly.
** In the anime when [[spoiler:Kurono]] finds himself in the aliens' position. He has his fair share in the manga too, when [[spoiler:he chose Tae over Reika, yet is now with Reika ''and'' Tae because of Reika having Gantz create a duplicate of him]].
** And Inaba, who appears to be the luckiest bastard in the universe (well, save the fact he was killed by Izumi and became a player in the first place) and has ridiculously high survival 'skills'. Once [[spoiler:he abandons his DirtyCoward traits, finds his resolve, fights like a man for the first time and kills several powerful aliens, then appears in front of his team, victorious and looking Badass... Yes, he gets immediately killed]].
* JerkAss: Kurono is an ''asshole'' in the early parts of the story, but gets better thanks to his girlfriend Tae and excellent CharacterDevelopment. Nishi and Izumi also apply, especially after the latter gets back into Gantz.
* JerkassHasAPoint: Near the end, Nishi acts like everyone is insane when they decide to use the teleportation ability of the Gantz spheres to [[spoiler:rescue captured humans on the enemy mothership rather than immediately striking its weak point to destroy it. He's right, and humanity almost loses because of the delay.]]
* KillEmAll: To start off, most of the cast die at least once, then most of the major characters die again. And when you think it was bad in the Osaka arc, the Italy arc starts. And then we have [[spoiler:TheEndOfTheWorldAsWeKnowIt]].
** [[spoiler: With the exception of Kei and Tae, the space tower collapses as it leaves Earth in Chapter 366, killing all of the giant aliens, Nishi and presumably the rest of the Gantz teams.]]
* LackOfEmpathy: Nishi, oh so much. Usually yelling at Gantz to score already, while the rest of the players're praying for someone, whose fate is unknown, to be alive and transferred safely. He bests himself when he coldly asks Gantz to [[spoiler:give him a new weapon instead of reviving Suzuki]] and then calmly leaving the room full of his crying teammates.
* LazyBackup: Characters will gladly just stand around, either tossing out exposition and/or philosophical nonsense, or just outright doing NOTHING while other characters are fighting and dying. This is one of the big reasons [[spoiler:Nishi]] dies.
* LoadsAndLoadsOfCharacters are killed.
* LovableSexManiac: Kurono. Though, the 'loveable' is disputed among fans.
* LoveTriangle: At first, there's one between Kurono, Kishimoto, and Kato. Later, there's one between Tae, Kurono, and Reika, [[spoiler:although the duplicate of Kurono turns this into a Love Rectangle of sorts]].
* LudicrousGibs: These generally happen when something is shot with the Gantz weapons.
* MadeOfPlasticine.
* MakeMeWannaShout: The "Mr. Tanaka" aliens.
* ManChild: Gantz has an 11-year-old's sense of humor.
* AManIsNotAVirgin: The main character has to score before receving a CharacterDevelopment. There's also Gantz teasing Sakurai about his 'Cherry' and later 'No-longer-a-Cherry' status, and Akira's EstablishingCharacterMoment.
* MessiahCreep: Kurono.
* MindOverMatter: Sakata and Sakurai, complete with PsychicNosebleed.
* MistakenForGay: Hojo. [[AmbiguouslyGay Maybe.]]
** According to the LicensedGame, [[spoiler:he is gay. His ending involves him developing a crush on Kurono.]]
*** Game endings not cannon. And his and his stalker's endings suggest he was at least bisexual to some extent. Anyway, he died kissing a girl...not mumbling "Kei-chan" while clearly not referring to the Kishimoto one.
* MostWritersAreMale: Most, if not all the young women in the Gantz universe exist to fall in love and have sex with the male characters, or throw themselves in harm's way to save their loved ones.
** There's plenty of guys willing to go to extremes for girls and others in an entirely non-sexual way, though... Virgin-kun? Lolicon-san? The two well-meaning SDF guys trying to save civillians on the ship? That's just the ones who helped the protagonists' girls... What about the "Stealth Hope" teams? Nah, the "sex and death" stuff just recurrs because they're major themes in the work in general. Now Katou - but only Katou - does tend to get girls killed far too often, but that's just Katou, his well-intentioned but hesitant style tends to get people killed when they follow him. Regardless of gender.
* MsFanservice: Kei Kishimoto.
* NakedOnArrival: Kei Kishimoto. This also happens to Kurono on a couple of occasions, when he's summoned by Gantz while in compromising situations.
* TheNicknamer: Gantz itself. Gives all the players nicknames based on appearance or behavior.
* NoCelebritiesWereHarmed: Tanaka Seijin is a parody of singer Seiji Tanaka.
** Some of the giant soldier aliens look like Creator/DannyTrejo, Mike Tyson, [[NoCountryForOldMen Anton Chigurh]], and the one that [[TheWorfEffect worfs]] the American Gantzers is based on [[VideoGame/FinalFantasyVII Sephiroth.]]
* TheObiWan: Several. Nishi subverts it, displaying open hostility to the team and only divulging information when pressed. Kato is one to Kurono, changing him from a JerkAss to MessianicArchetype. [[spoiler:Kato gets a StoryArc [[ADayInTheLimelight In The Limelight]] when Kurono revives him later on]]. Inverted at first with Sakurai and Sakata [[spoiler:in that [[TheMentor Sakata]] survives while Sakurai dies]], but played straight when [[spoiler:Sakata revives Sakurai and pulls a HeroicSacrifice]].
* OfficialCouple: [[spoiler: The first]] Kei Kurono and Tae Kojima.
* OffscreenMomentOfAwesome: Who didn't regret not seeing how Hoi Hoi'd earned its points?
* OneSteveLimit: Averted with [[spoiler: Kei Kurono and Kei Kishimoto.]]
* PowerArmor: The Gantz suits fit this trope, as they endow incredible strength and durability to the wearer, though they can wear out if they take too much punishment. There is another Gantz armor, as seen in Osaka and Italy, which should be superior to the regular suits, but all the users seen are dead.
* PrettyLittleHeadshots: Completely averted, both by the Gantz weaponry and during [[spoiler:Izumi's shooting spree]].
* PromotionToParent: Kato and his younger brother Ayumu.
* PsychoticSmirk: Nishi's PerpetualExpression.
* RagtagBunchOfMisfits: Since AnyoneCanDie, it is to be expected that many of the Gantz-armed people have not been cut to do this while they were alive.
* RedShirt: So many that this actually qualifies for...
** RedShirtArmy: The Gantz teams and all law enforcement.
* RedemptionEqualsDeath: [[spoiler:Inaba]], though more of an Usefulness Equals Death or Action Equals Death, as he'd stopped being a {{Jerkass}} a bit earlier.
* ReluctantWarrior: Several of the Gantz team members (most of whom didn't exactly ''volunteer'') aren't initially real gung-ho about the idea of hunting and killing aliens, but nearly all of the ones that survive eventually get over this. Kato is probably the purest example of the trope, since while he does eventually get accustomed to his teammates' use of lethal force to the point where it doesn't make him suffer a HeroicBlueScreenOfDeath and break down crying every time, he still personally tends to almost always at least ''try'' to use the capture/teleport gun whenever possible as opposed to one of the "ludicrous gibs" type, and risking himself to save others is one of his defining character traits. He ''does'' give a bully a pretty savage beatdown (chapter 27 of the manga, episode 7 of the anime), but this seems to be mainly to teach the bullies that he's capable of doing so and that if they keep picking on the weaker kids he'll come after them.
* RunningGag: Before he stopped being a JerkAss, Kurono would always be teleported into the Gantz room in compromising positions.
* RuleOfThree:
** The Hundred Points Menu options: Gain a better weapon, leave the Gantz business forever, or bring back a past Gantzer. TheMovie leaves out the 'weapon' one though.
* SacrificialLion: A ''lot''. Probably the most significant example is [[spoiler:Kishimoto]].
* SavePoint: The apartment, in a sense. [[spoiler: Participants are "saved" there at their unhurt state, and retain full memory of what they experienced, as long as they are not dead when on a mission]]
* SerialKiller: [[spoiler:Nishi]] could have become one if it wasn't for Gantz' interference, based on his behavior and [[spoiler:his classmates' comments before he kills them.]]
** Also Hajime Muroto and Kajiura Ryuji.
** [[spoiler:Izumi]] deserves a special mention here folks; [[spoiler:after all he did massacred dozens upon dozens of people in cold blood (including several now main characters)]]. His reason for doing this? So he could rejoin the Tokyo Gantz team and murder himself some aliens while keeping some meat shields handy just in case. [[spoiler:This comes back to [[ZeroPercentApprovalRating bite him on the arse later]].]]
* ShipTease: In the anime' after leaving Kurono's home when the two have a falling out, Kishimoto seemingly returns, as she has nowhere else to go, a fact that deeply upsets her. She begins crying into Kurono's chest and...the next scene shows them having sex. [[spoiler:However, it is then revealed this was all part of a dream Kurono had and it ends when they climax. In the manga, it was made clear from the get go that Kurono was merely dreaming about her, but in the anime' the scene is only revealed to have been a dream afterwards]].
* ShoutOut: ''FistOfTheNorthStar'', told as a bedtime story by Kato; ''{{Ringu}}'' with the stalker girl who looks suspiciously like Sadako; the female vampire, whose code name is KillBill; and Sei, who looks exactly like ''Franchise/TombRaider'' heroine Lara Croft.
** And as of chapter 326, we have an alien who looks uncannily like Creator/DannyTrejo.
** During the alien invasion, a man and a woman are lying on the ground. The woman is freaking out (understandably so) and the man kisses her to get her to calm down, AND IT WORKS. The exact same thing happened during the 2011 London riots, except in Gantz, the man is shot and then explodes into chunky salsa, which makes the woman freak out again.
** [[spoiler:Tae]] being killed by [[spoiler:Izumi]] from behind with a katana may look [[VideoGame/FinalFantasyVII familiar.]]
** Chapter 339 has some people in a cage singing "We Are", from ''Manga/OnePiece''.
* SingleWomanSeeksGoodMan: Why MessianicArchetype Kato always has a hot girl willing to blow herself up for him, when alive.
* StalkerWithACrush:
** Reika to Kurono - she keeps visiting Kurono's house even when he isn't there and calls Kurono late at night to asks him on a date.
** Sadayo Suzumura as well who stalks Masanobu Hojo.
* SurvivalMantra: The reason Kurono always wins.
* TalkingIsAFreeAction: Holy cow. The enemies will gladly stand around for seemingly minutes at a time while a character debates the ethics of killing, their chances against said enemy, or how they feel about the situation. Somewhat averted later in the manga, however, as the aliens can and DO kill characters [[KilledMidsentence in mid-sentence]]...
** In the anime, the scene with the thousand arm alien has Kishimoto see the acid heading for Kato, realize instantly what it must be despite having never seen it before, have a brief conversation with Kurono, charge across the room, interpose herself in front of Kato, kneel down, and still have time for an internal monologue about how she's never been happy except when she's with Kato, and how she's sorry for Kurono but Kato really is more important to her, and how she hopes Kurono will help Kato and protect him, before the acid finally hits.
* TeleporterAccident: Sometimes it happens that the very slow teleporting process creates a clone of a person. In the anime, one of the girls gets doubled this way, with the original unaware what her clone has to suffer. In the manga, the protagonist gets cloned, and each clone then starts dating a different girl.
* TeleportersAndTransporters: The Gantz sphere uses a very slow teleportation process on the team members; it gradually sends their bodies in and out of the apartment, starting at the head and moving downward. The characters' innards are visible while this happens. This is played for grossout horror, and occasionally comedy (Kurono is astonished that while his lower half is in the apartment, his upper half is already outside).
** TeleportGun: One of the Gantz weapons is a "Y-Gun" that traps its victims with a net, then teleports them (using the process described above) to an as yet unknown location.
* TokyoTower: Can be seen from Gantz's apartment.
* TooDumbToLive: When you have just ''died'' and find yourself in a locked room where other people ''teleport'' in, explain your situation and tell you to put on that body armour or die a horrible second death, ''listen to them instead of writing them off as cosplayers.'' Your survival won't be guaranteed, but at least you'll last more then 5 seconds.
** The guns blow things up...after a few seconds. So instead of whining about how you can't beat an alien of the story [[WhyDontYaJustShootHim shoot it already!]]
** In recent chapters, [[spoiler:students in Kurono's class all casually go their own separate ways instead of listening to their teacher, who suggests that they should all stick with the one person (Kurono) who just successfully fought off two aliens ''right in the middle of an invasion'']].
*** And even the ones that do follow Kurono proceed to laugh about his otaku outfit and question why they are following the one kid who just smashed two aliens into blood pancakes. Secretly, Kurono was attending Too Dumb To Live University all this time, and was a daytime lantern there because he actually had any will to live at all.
** The "innocent bystanders" in general, whose reaction to aliens wrecking havoc begins with "Cool, let's go there and check it out" (when they see them on the news), then "Cool, let's come closer and take pictures" (when they see it from far away), then "OMG it's horrible, let's just stand here while it kills us", then "OMG someone's fighting, let's stick around and watch". Not to mention the zero common sense (walking home naked, in a war zone, while you don't know what the hell is going on is ''dumb'', folks), and zero respect they have for the heroes. One can almost sympathize with Nishi who just wants to save himself instead of saving the civilians.
*** That's not even the worst of it. You'd think that after the massive, widely televised and reported incident with Oni's in Ikebukuro where EVERYONE could see the hunters and the aliens, that people would at least have an inkling about what to do when monsters show up. Instead, they act exactly the same things in EVERY arc until Katastrophe, assuring themselves that it's all "CG" or a film shooting. It gets worse when you realize half the time that they'll stay right where they are EVEN WITH THE EVISCERATED REMAINS OF THEIR FRIENDS LYING IN FRONT OF THEM.
**** [[UptoEleven Taken Up to Several Billion]]: with the latter portion of the Katastrophe arc. Despite witnessing the deaths of something like half the human race over the course of two days, suddenly all the civilians are willing to crawl out of their holes and embark on the alien spaceship that-and I cannot stress this enough-JUST MURDERED ALMOST EVERYONE THEY KNEW, because of an incredibly obviously false peace treaty, and start treating the hunters-y'know, the guys who they've seen fighting monsters and saving lives-like cockroaches.
* TookALevelInBadass: Kurono, after a disastrous mission.
** Takeshi, after watching Kaze practice, proceeded to kick some serious alien ass all on his lonesome with the moves he picked up.
** Reika started out as TheChick of the team, and then became the first person to [[spoiler:"clear", i.e. win the game twice in-story, without dying even once in process]].
* TriggerHappy: Quite a few Gantzers are shown to be.
* VillainProtagonist: The Gantz teams, until Katastrophe. The aliens are inoffensive unless provoked.
* WeAreTeamCannonFodder: The Tokyo team up to and including the Buddha Temple mission; the Osaka Team in that arc; and presumably many Gantz teams from all over the world in the Italy arc.
* XMeetsY: Nishi gave a remarkable description.
-->''"Itís kind of like the ''Film/{{The Blair Witch Project}}'' and Ö ''Franchise/{{Men In Black}}'', and Honoo challenge and Franz Harary mixed into one."''
* {{Yakuza}}: Two of them are among the first group of hunters.
* YouMustBeCold: Kato getting Kurono to lend his jacket to the naked Kishimoto.
* YoungerThanTheyLook: Jouichiro Nishi is only supposed to be 13 or thereabouts, but he looks like an older teenager at least except for his possible smaller size.
* YourHeadASplode: This happens when a player tries to leave the mission area or by revealing any information about Gantz to a non-player; also see PrettyLittleHeadshots.
[[/folder]]

[[folder: Manga Exclusive Examples]]
* AdvancingWallOfDoom: sort of. The invisible boundary for the mission zone closes in towards the target as time runs low, though it does not seem to have any noticeable effects on the mission.
* AlienInvasion: [[spoiler:The plotline of the last third of the overall story]] and arguably the whole manga from a certain perspective.
* AloofBigBrother: Akira thinks of Kei's attitude like that, despite having very little respect for him. Also, he's himself sort of Kei's aloof ''younger'' brother.
* AnguishedDeclarationOfLove: [[spoiler:Anzu does this after Kato volunteers to be the bait to lure the Nura alien into a trap.]] Also, [[spoiler:Kishimoto]] does this when she takes a blow and dies for Kato.
* AntiClimax: His HumongousMecha is mentioned below, but Oka himself turns out to be this. After being hyped up as a trump card for the entire mission, the man who cleared 7 games goes 3 rounds with the final boss, then gives up and runs away only to be killed offscreen later.
* AnythingThatMoves: Kazuo Kuwabara will screw anything with a wet hole, to include [[spoiler:''literally'' fucking Nurarihyon in the face when it became a [[ShapedLikeItself giant woman composed of naked women]].]]
** [[spoiler:A Gantzer gets it on with a Giant in chapter 368. And then his friends from the British team kill the Giant when she throws the guy off for ejaculating in her.]]
* ApocalypseHow: Katastrophe seems to be either a Class 2 or 3.
* AxCrazy: [[spoiler:Nishi]]. After his classmates [[BullyingADragon throw him out the window of their classroom]] (on the second story of the school), he comes back [[spoiler:and slaughters the entire class except for one girl; see BecauseYouWereNiceToMe below]].
* BadassBystander: A random guy known only as "Old Man" kicks the asses of quite a few parasite/tumor creatures before finally going down. And he does it while ''completely naked.''
* BattleCouple: [[spoiler:Reika and the second Kurono.]]
* BecauseYouWereNiceToMe: When Nishi [[spoiler:killed his entire class, he left the girl who had a crush on him alive. She was also the only one who didn't vote for throwing him out the window.]]
* BewareTheNiceOnes: If you're a Giant alien, you are ''screwed'' if Sakurai catches you [[spoiler: snacking on people.]]
* BigDamnHeroes: Kato spearheads such a moment in ch. 351.
* BloodKnight: Izumi; Kaze to a ''much'' lesser extent.
* BodyHorror: As if there weren't enough horrible ways be killed, eaten and mutilated as a human, in Chapter 347 this takes a more horrible turn when some of the alien lifeforms inhabiting the [[spoiler:giants' space-cities are apparently able to release glowing mutagenic spores]] that turn whoever they touch into a mutating, murderous, monstrous version of themselves with heads, arms, legs and other general appendages and viscera everywhere and nowhere they should be. Interestingly enough this effect seems to apply to nonorganic material as well, as [[spoiler: one of the Gantzers affected by it sprouted extra guns, Gantz suit bits and glasses.]]
* BrickJoke: After Gantz declares Sakurai "No longer a Cherry", we see Kurono get a message on his phone from Sakurai - whose email address ends in 'cherry.jp'.
* CassandraTruth: [[spoiler:The creator of Gantz actually reveals the entire truth to reporters who get too close since he knows no one will believe them anyway.]]
* TheCavalry: In chapter 311, the suited aliens have Clone Kurono trapped with no possibility of escape, guns pointed at him at point blank range - when suddenly [[spoiler:the whole pack of aliens are wiped out in one attack, and a cloaked Gantz team reveals itself.]]
* ChivalrousPervert: Subverted in a recent TearJerker moment. With Tae abducted along with countless other humans, she's pulled from the water (that was drawing them all off to death) by a middle-aged man. When asked why he chose her specifically, he said it was because he's a lolicon. [[spoiler: The subversion comes when he reveals that he saved Tae because she resembles his recently-killed daughter.]]
* CoolOldGuy: "Old Man".
* DoppelgangerReplacementLoveInterest: The LoveTriangle between Kurono, Tae and Reika finally concludes [[spoiler:when Reika cashes in her points for a cloned double of Kurono]].
* [[spoiler: EarnYourHappyEnding: After all the horror and trauma they endured, Kurono and Kato are able to survive and finally make it back to their loved ones. And it is implied that many, if not all of the characters who died as a result of Gantz are brought back to life... even though, the series still has a case of FourLinesAllWaiting.]]
* TheEndOfTheWorldAsWeKnowIt: See FromBadToWorse.
* EnemyMine: Two vampires are forced to join the team after they successfully infiltrate the Gantz room.
* EyeBeam: The leader Nurarihyon alien.
* FanDisservice: And it was hidden as {{Fanservice}}, to boot. [[spoiler:It turns out that the Reika in a sex scene is actually a shapeshifted alien. A ''[[HoYay male]]'' shapeshifted alien.]]
* FauxActionGirl: Anzu. We never learn if she'd "cleared" the game before, but she appears to be an experienced player who knows how to act on the battlefield and is eager to make fun of Katou's naÔvete. Then she takes an action. And she messes it up, gets rescued by said Katou, is reduced to his SatelliteLoveInterest and [[spoiler:finally [[TakingTheBullet dies for him]]]]. Not that the rest of her team did significantly better, but still...[[spoiler:she finally does something after being revived by the Osaka nerd before the Katastrophe in chapter 346 by shooting and destroying an alien fish lizard monster thing as it begins to savage a bunch of people they'd just saved from the giants. This then backfires in 347 when Anzu and the nerd destroy another alien; releasing light spores which cause people to mutate into horrid abominations made of their own body parts (you grow extra heads, arms, legs of all different sizes out of your original skull). It also got worse.]]
** Female vampire Chiaki borders on [[DarkActionGirl Dark]] FauxActionGirl territory, since despite of her [[KillBill badass looks and nickname]], most of her actions ends by her ass being saved by Host Samurai.
* FireForgedFriends: The Gantz team that Kurono leads.
* FiveManBand: Several, but the longest-lasting configuration is;
** TheHero: Kurono
** TheLancer: Izumi, Suzuki
** TheSmartGuy: Sakata, Sakurai
** TheBigGuy: Kaze
** TheChick: Reika, Inaba
** TheObiWan: Sakata, Suzuki
** TagalongKid: Takeshi
** TeamPet: Hoi Hoi
* FromBadToWorse:
** The Osaka arc presented an entire ''army'' of foul beasts/aliens as well as three immensely powerful boss monsters, one of whom was so strong it wiped out a more experienced, better armed, and brutal Gantz team almost single-handedly, as well as displaying a [[HealingFactor regeneration ability Wolverine would envy]]. The main team barely survives...and then finds out that Gantz has a clock that is counting down some sort of [[TheEndOfTheWorldAsWeKnowIt worldwide catastrophe]] which is due in about a week. And just when you think things can't get any worse, the Italy arc starts, and there isn't a sewer big enough to produce all the excrement that has hit the fan.
** Then Chapter 303 came out. Somehow, it's gotten EVEN DAMN WORSE. Specifically, [[spoiler:alien robots with the same visual theming of the Gantz sphere and weapons land worldwide, and begin to level everything. Aliens with the same large Gantz suits seen in the Osaka arc then appear in everywhere and start to do the same, harvesting the civilians. And in Chapter 306 the alien mothership starts coming down... All humanity need is a final blow.]]
** Just when you think it couldn't get any worse than that, Chapter 342 came out. [[spoiler: After rescuing Takeshi from the explosions, Nishi finds Gantz on the street, impaled through the head. Oh, and Kaze's group is trying to get Gantz to get them back as Giants close in on them.]] To put it bluntly... '''[[PunctuatedForEmphasis IT! GETS! WORSE!]]'''
*** And now we learn that [[spoiler: the Giants are ''recreationally fishing humans'', complete with bait and rod guns. The fact that Tae is caught in the middle of the group being fished makes the situation worser than ever for Kei.]]
*** Not only is [[spoiler: Kei-1]] in a bad situation; in chapter 345, [[spoiler:Kei-2's]] group of merry men [[spoiler:have been transported to an unknown region of the alien mothership described as "hell" in the previous chapter, where they've found a mass grave featuring hundreds of humans, including JSDF members and people from other Gantz teams. To top it all off, the civilians they just rescued showed the standard Gantz-esque display of immediately showing zero appreciation and leaving the team only to encounter another group of aliens which can only be described as large creepy crawlies.]]
** And by chapter 370, BodyHorror gives way to existential horror as [[spoiler: everyone is being literally lectured by a giant space head on the most merciless version of materialism.]]
*** [[spoiler: Just to prove that humans aren't anything special. Giant head resurrects several of the main cast...and then promptly kills them.]]
** And ''then'', [[TheEndOrIsIt just as everything seems to be over]]...everyone figures out the Gantz balls are inoperable and are now stranded on a space ship without anyway to get back to Earth. The end of the chapter is literally tagged, "The end of despair becomes the end of hope."
*** Then the plot starts flip-flopping at this point. [[spoiler:Turns out just ''one'' is still active, and literally everyone on the ship rushes to get to it, resulting in a very lengthy line to teleport people out. Meanwhile, the Americans decide to arrange one-on-one fights with the special forces giants to the death to kill time... Right up until one of said giants turns out to be a badass war hero that curbstomps the entire American team, and then demands Kei Kurono, the murderer of his brother, to show himself so they can fight, otherwise [[ColonyDrop crash the mothership into the Earth, basically killing off all of humanity.]] Everyone on Earth promptly loses their shit (including mass suicides), before Kei steps up to the plate, resulting in one final showdown. Kei ''nearly'' wins, only for the giant to manage to get the upper hand and nearly steps on him, only for Kei's teammates to step in and pull his ass out of the fire to join the fight.]] The author loves building up the suspense to ridiculous levels, it seems.
* FromNobodyToNightmare: [[spoiler:Sakurai goes from twisting candle flames to popping giants' heads left and right.]]
* FunnyBackgroundEvent: before the Buddha Alien mission begins, you can spot the dog harassing Sadako in the back.
* GentleGiant: Daizemon "Muscle Rider" Kaze, towards Takeshi.
* GutPunch: [[spoiler: Kurono]] getting killed off at the end of Phase I was upsetting.
* HeWhoFightsMonsters: Many Osaka Gantz members are just as bad, if not worse, then the aliens they fight against. In fact, a big story point during the mission involves [[spoiler:Kato making the conscious decision to help bystanders instead of ensuring his own survival.]]
** Invoked in a rare positive light during chapter 352. One of the hunters outright states, "I wouldn't count us out just yet. We may be fighting monsters, but our squad has a few monsters of its own." Cue several images of the team going [[VideoGame/{{Doom}} Berserker pack]] on the previously nigh-unstoppable abominations.
* HumongousMecha: Used by Oka Hachirou in the Osaka arc, [[AntiClimax although it gets destroyed 3 pages after it is introduced.]]
* IWantMyBelovedToBeHappy: Reika [[spoiler:uses her 100 points to resurrect Kurono's girlfriend...and then later subverts the trope by resurrecting another Kurono for herself.]]
* ImAHumanitarian: [[spoiler: The giants]] have their own agriculture and animal husbandry, but they harvest humans and eat them as snacks because of their culture. They apparently know that humans has a civilization, but don't care.
* TheIdiotFromOsaka: Daizemon Kaze, and some of the Osaka team members.
* IdolSinger: Reika, in the manga.
* InformedAttribute: Tae is said to be suffering from PTSD as a result of her experiences, but it doesn't seem to have any apparent effect on her behavior.
* IntrepidReporter: Kikuchi
* KatanasAreJustBetter: The vampires are capable of creating/pulling from the hand various human weapons, but when a ''serious'' fight kicks in, katana seem to be the only effective one. High tech katanas is also part of the Gantz arsenal, and they remain useful even in the most recent chapters, when [[spoiler: they can cut through aliens that guns cannot harm]].
* KickTheSonOfABitch: Along with a fairly hefty dose of LaserGuidedKarma. A good amount of the people who wind up in Gantz's room are either rapists, murderers or both. Most of those guys end up being eviscerated within chapters, if not pages of their introduction.
* LampshadeHanging: The author introduces a whole heap of coward characters, and then writes something like "Those who don't want to fight are useless".
* LaserGuidedKarma: The life expectancy (read: chances of not being torn in half by a T-Rex) of {{Jerkass}} characters is significantly lower than that of decent ones. Somewhat justified, considering it's not that good characters are inherently stronger or better at surviving but rather the fact that they tend to work together much better and are also more likely to be revived.
* LoveMakesYouCrazy: It seems like [[spoiler:Reika]] is starting to head down this road after [[spoiler:being rejected by Kurono. She resurrected a second copy of him after getting 100 points in Italy.]]
** [[spoiler: She feels guilty about it imediately afterwards though and when the [[EndOfTheWorldAsWeKnowIt Alien Invasion]] begins she seems more eager than usual to sacrifice her life in the defence of other as some sort of atonement]]
* ManlyTears: Daizemon Kaze after finding out [[spoiler:Takeshi's 'stepfather' beat him to death over ''a pudding cup'', while his mother did nothing to stop it.]]
* MauveShirt: [[spoiler:Inaba]] among others. Interestingly, he was perfectly fine as long as he kept a RedShirt status, and got killed off right after receiving his CharacterDevelopment.
* MexicanStandoff: The Osaka and Tokyo Gantz teams get into one when they first meet; it's defused a page later when [[spoiler:some of the Osakans recognize Reika's boobs.]]
* MuggingTheMonster: Nishi's classmates. If we don't start with the ''actual'' monsters
* MyGodWhatHaveIDone: Sakurai experiences this [[spoiler: after realizing that his massacre of giant aliens involved taking the life of an infant and an elderly giant woman in Chapter 340.]]
* NobleDemon: Vampire 'Host Samurai', to an extent.
* NoOneShouldSurviveThat: [[spoiler:How did Tae and Kei escape the dying giant alien ship? Using a Flying Gantz Bike to go through an airlock and enduring '''space''' [[http://www.mangareader.net/gantz/366/16 with all its pressure, cold temperatures, and lack of oxygen.]] And that's before you get to crossing the atmosphere.]]
* OccidentalOtaku: Kikuchi's German interpreter Sebastien seems to be this.
* OneWingedAngel: [[spoiler:The Nura alien]]. Lampshaded with one of the characters exclaiming that it just doesn't end.
* OmnicidalManiac: Izumi, who [[spoiler:goes on a shooting rampage just so he can get killed and return to the game. This also bulks up the team's roster.]]
* OurHeroIsDead: [[spoiler:Kurono gets killed in a fight with vampires, although it doesn't take that much (in story) time to get him revived.]]
* [[PandaingToTheAudience Panda-ing To The Audience]]: Hoi Hoi.
* PapaWolf: Kaze to Takeshi. When one of the Nura alien's attacks hurt Takeshi, Kaze went apeshit and attacked it, dealing more damage than Oka Hachirou did even with his PowerArmor.
* [[PetTheDog Pet The Panda]]: Cold-blooded killer Izumi will not hesitate to murder dozens of innocent Tokyo citizens, including Kurono's girlfriend, but he will save [[TeamPet Hoi Hoi]] when escaping a bunch of dinosaurs.
* PlotArmor: How else do you think [[spoiler:Tae]] survives for so long?
* [[PunchClockVillain Punch Clock Sociopaths]]: Remarkably enough, the Osaka team. They get their own bonus chapter(s) that show what happened shortly before and shortly after the Osaka hunt. As it turns out...
** George and Knob are [[http://view.thespectrum.net/series/gantz-volume-01.html?ch=Osaka+Chapter+001&page=11 coworkers at a fast-food joint]]. Their dialogue and uniforms even make them seem like expys of Beevis and Butthead.
** The three sadists are [[http://view.thespectrum.net/series/gantz-volume-01.html?ch=Osaka+Chapter+001&page=12 amiable clerks at an electronics store]].
** Kuwabara is [[http://view.thespectrum.net/series/gantz-volume-01.html?ch=Osaka+Chapter+001&page=15 a well-liked English teacher]] at what appears to be a middle school.
*** In stark contrast to their mission behavior, practically the entire team seems to be composed of well-adjusted members of society.
* PsychoForHire: Shion Izumi, Jouichirou Nishi, Kajiura Ryuji and Hajime Muroto.
* RedemptionEqualsDeath: After being a colossally sociopathic cunt for a hundred chapters [[spoiler: Izumi]] finally dies...saving his girlfriend from vampires. Even ""he"" is surprised.
* RoaringRampageOfRevenge: Sakurai goes on one after [[spoiler: Tonkotsu dies.]]
* SayMyName: Oh boy, this trope has really become frequent in the Katastrophe arc. The TAE-CHAAAAN! and KEI-CHAAAAAN! cries these days are as fundamental to ''Manga/{{Gantz}}'' as LudicrousGibs and wanton nudity.
** It seems that the author recognizes this and makes fun of it as well. In a recent chapter, Kurono and Tae are using these cries as a call and response [[spoiler: when an alien girl decides to keep Tae as a pet. The alien gets annoyed and puts her thumb on Tae's mouth to shut her pet human up.]]
* ShockAndAwe: The Lightning Oni who is the boss of the Oni mission. [[spoiler:Also, some of the giants, due to these weird watch/wrist band things.]]
* SmurfettePrinciple: Reika within the Tokyo Team. Also, KillBill appears to be the only female Vampire.
* SpinOff: One each for the Osaka team and for Nishi.
* {{Stripperiffic}}: The Gantz suits consist of several sections of material held together by the straps with the silver sockets. The still art at the end of each chapter likes to take advantage of their design.
* SuicideByCop: Done by [[spoiler:Izumi]] who commits the worst mass homicide in history, so that he can be killed and sent to Gantz.
* TallDarkAndSnarky: Izumi.
* TeamPet: Hoi Hoi.
* TeamSpirit: The entire point of the Nura mission. The Gantz team clear and survive the mission by working as a team while nearly everyone on the Osaka team ends up dying because they think it's everyone for themselves.
* ThisIsForEmphasisBitch: That Osakan hunter who cleared Gantz 7 times? He plays ping-pong, bitch.
* [[spoiler:ToServeMan]]
* TrickBoss: The Ring aliens [[BreatherBoss get their asses handed to them quite quickly]], thanks to the Gantz team having done some out-of-game training sessions. [[spoiler:Next target? Tae. Cue intra-team civil war.]]
* [[spoiler:VichyEarth]]
* WhamEpisode: Chapter 369. [[spoiler:It reveals that the aliens the Gantz teams were fighting against all this time were immigrants from a dying Solar System and that the Room of Truth broadcasted the technology capable of defeating the aliens. Add the fact that the humans themselves turned the concept of fighting the aliens into a game, and you suddenly realize that this whole series is TheWarOfEarthlyAggression on Earth.]]
* WhamLine: During the Katastrophe arc: [[spoiler: "Gantz can't bring people back to life anymore. It can't heal injuries either, nothing like that."]]
* WhatHappenedToTheMouse:
** Hoi Hoi disappears after the Italy arc; presumably he was killed, but it was never shown.
** The rest of the main cast (excluding Kei, Tae, and Kato) all but completely disappear from the finale, leaving their fates unknown.
** The Host Samurai and Kill Bill are still out and about and free to do whatever it is they wish to the rest of Tokyo
** The Gantz factory in Germany is still mass producing Gantz balls as far as we know.
** The governments of the world now know about the Gantz teams, and the equipment and weapons they all use will surely change the face of war on Earth forever.
** We never see how Kurono's parents react to their favorite son's death, or if they even know he's dead at all.
* WhereDoesHeGetAllThoseWonderfulToys: From Gantz. [[spoiler:Gantz gets them from Germany. And Chapter 369 reveals that the wealthy German guy's daughter got it from aliens similar to the ones in the Room of Truth.]]
* WhyWontYouDie: The Nura alien.
* TheWorfBarrage: The entire Osaka team vs. the Nura alien.
* {{Yandere}}: [[spoiler:Well, it certainly seems Reika's recent plan to score Kurono for herself wanders right into Yandere territory.]]
* {{Youkai}}: The themed creatures in the Osaka arc.
[[/folder]]

[[folder: Anime Exclusive Examples]]
* AdaptationExpansion: several additional scenes depict the newer Gantzers ''before'' they enter the room.
* AngelsPose: At the end of the TitleSequence, from episode 6 onwards.
* AnimeThemeSong: "Super Shooter" by Japanese hip-hop group Rip Slyme (you might remember them from the "Foo-La-La" {{Animutation}}).
* ChekhovsGunman: The filler arc does this with several background characters, including [[spoiler:the hobo killers, Kurono's teacher, the owner of the bookstore frequented by Kishimoto and a gang member who knew the biker that used the Gantz-gun in public.]]
* EvolvingCredits: The anime TitleSequence often changes to add the newest characters.
* EyeScream: [[spoiler: Nishi, when he is killed by Suzuki Seiji]]
* {{Filler}}
* FollowTheLeader: the anime plays up Kurono's internal monologues a lot, like a more well-known DeadpanSnarker [[LightNovel/HaruhiSuzumiya whose name starts with K.]]
* GeckoEnding: The anime veers from the manga after the Buddha Temple arc.
* GrossoutShow
* ImprovisedWeapon: When the hobo killers get sent to the room and target an unarmed Kurono, he responds in kind with a soaking wet rope of knotted clothes. Add muscular agumentation for an instant EpicFlail.
* InactionSequence
* LateArrivalSpoiler: The end credits [[spoiler:show Kato and Kishimoto disappearing, leaving Kurono alone.]]
* MrsRobinson: Sei Sakuraoka with Kurono. Between the manga and anime, he states that he is 15 and in 10th grade. She is at LEAST 18, and could be as many as 10-15 years older than him. In the anime (depending on which version you listen to) when talking to him, she refers to herself as "big sister" (Japanese audio) and later questions a potential relationship between the two of them because of "the age thing." (American audio). None of this stops them from having sex, twice.
* NoCelebritiesWereHarmed: The "Tanaka seijin" joke is lost as he's renamed to "Suzuki seijin". And thanks to an ArtShift, Sei Sakuraoka's resemblance to Lara Croft is also lost.
* WagerSlave
* WallBangHer: [[spoiler:Kurono and Sei]] have sex like this at the end of episode 15 and begining of episode 16.
* YouGottaHaveBlueHair: Nearly averted-Most characters either have brown, blond, or black hair but Kishimoto's red and the younger hobo murderer's blue hair fall squarely into this trope. Sei Sakuraoka's dark blue may also count, but it may be supposed to be black. Joichiro Nishi's hair also happens to be green.
[[/folder]]

[[folder: Film Exclusive Examples]]
* FaceStealer: [[spoiler:Vampire!Kato does a SwordPlant into Nishi to turn into him.]]
* KatanasAreJustBetter: To the extent that the final battle of ''Perfect Answer'' relies almost entirely on these, both the Gantz-issued ones and [[spoiler:the vampire-summoned ones used by Vampire!Kato.]]
* PragmaticAdaptation: Many of the one-time only Gantzers don't appear at all, Tae shows up early, and perhaps most importantly, all the hunts go much differently than their anime or manga equivalents. For example- rather than wander around in only Kato's jacket, ''Kishimoto'' is the only person wearing a Gantz suit in the Green Onion alien hunt.
* [[spoiler:ResetButtonEnding]]: Crossed with allusions to Messianic finale. [[spoiler:Kurono]] finishes Gantz' mission and is awarded full points, giving him the power to undo everything bad while all of the good guys manage to retain their character development. The catch, [[spoiler:Kurono]] must sacrifice his own future and be imprisoned forever.
* SuspiciouslySimilarSubstitute: Two. Eriko for Reika, and [[spoiler:clone-Kato for Izumi.]]
[[/folder]]

[[folder: Game Exclusive Examplers]]
* LicensedGame: A PS2 game based on the manga exists. It's half DatingSim and half action game. It ends after the chibi alien mission, right before Izumi appears.
* {{Tsundere}}: Nishi in the Gantz PS2 game if you follow his route. He even says something along the lines of "Don't get the wrong idea; I didn't come here to help you" during one event. This is mind-meltingly weird for anyone who's familiar with the {{Jerkass}} Nishi from the manga and anime, to say the least.
[[/folder]]

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