Trap Master

A character whose style of fighting isn't about hitting the opponent directly. This character far prefers arranging traps in such a way that, when the opponent arrives, he only has to let the victim act, or activate the traps with minimal effort, to utterly dominate said opponent. Difficult but Awesome is almost a requisite, as these characters are different from the basic Attack Attack Attack mindset of many gamers, favoring taking their time to indirectly cause their own victory.

Has nothing to do with gender reveal tropes.

Anime/Manga

 * In One Piece, the Straw Hat Pirates' mechanic Usopp fights via deception. A large part of this is to lure his enemies into becoming vulnerable for one of his attacks. Once he's caught someone in a trap, chances are that person will get caught in a number of subsequent traps until they lose consciousness. Even the protagonist of this series is not immune to such a spectacle.
 * On top of that, one-time character Foxy the Silver Fox's power is the ability to slow down time in specific regions, which wear off exactly 30 seconds later. He mainly uses this power to cause projectile weapons, such as arrows and bombs, to float in midair and suddenly and unpredictably hurl themselves at his foes.
 * Definitely Largo, captain of the Amigo Pirates. His Devil Fruit allows him to create a basic "sticky net" from his hands, and he can make other varieties out of any material he's eaten. Heck, he can turn his own body into one.
 * Kakyoin of JoJo's Bizarre Adventure can use his Hierophant Green to produce invisible nets to entrap foes. He defeats Big Bad Dio this way.
 * Early on in Project ARMS, Ryo deals with a couple of opponents this way.
 * In Pokémon, the Team Rocket tries (and fails) to be this.
 * Kankuro from Naruto often uses his puppets this way.
 * Shikamaru has elements of this.
 * Genno from the Trap Master Arc (filler) also counts.
 * Satoko from Higurashi no Naku Koro Ni is an extreme example of this, to the point of
 * Frenda of ITEM from To Aru Majutsu no Index is also one, although she specializes in setting up explosives.
 * Student Council Vice President Akira Himuro from Fujimura-kun Mates somehow was able to set up pitfall traps throughout the entire town without anyone's notice. She triggers them with the slightest provocation.

Comic Books

 * Supervillain The Trapster from Marvel Comics.
 * A lot of Batman's enemies love their Death Traps, especially the Riddler, who practically relies on them.

Film

 * Kevin McKallister, of Home Alone fame, would be the perfect example, booby-traping his entire house and causing Amusing Injuries to the pair of thieves that tried to break into it; and, in the sequel, an abandoned building in New York. In fact, the whole series is based on a kid being this and outsmarting grown men.
 * Jigsaw of the Saw films is kind of obvious. "Wanna play a game?"
 * Nancy in the first A Nightmare On Elm Street. She sets series of traps for Freddy and he is caught in all of them.
 * The antagonist of the 2009 film The Collector.
 * Three Finger in Wrong Turn 3 Left for Dead, though he does occasionally get his hands dirty.

Literature

 * Repairman Jack turns out to be one of these in Legacies, in which he'd revealed to keep an entire decoy house rigged with traps, ready to spring on anyone who comes after him for payback.
 * The serial-killer duo from Michael Slade's Ripper rig an isolated mansion with deathtraps, then invite a bunch of victims over for a murder-mystery dinner.

Real Life

 * The Viet Cong, as any Shell Shocked Veteran can tell you.
 * Serial Killer H.H. Holmes and his "murder castle".

Video Games

 * Mega Man 2 has Crash Man, whose only way to fight is to run around planting timed explosives on the floor and walls. It can be troublesome even when knowing about his gimmick because he puts so many up at once.
 * In Marvel vs. Capcom 3, Trish fights mainly by planting portals on the ground and in midair. An opponent who gets too close to one will get hurt by things coming out of these portals.
 * Ultimate adds Rocket Raccoon who utilizes 4 different landmine traps (boulder, shrapnel, net and spring), ignitable oil slick bombs, over-sized bear traps, a log pendulum trap, and ditch traps which trap the opponent in the ground while Rocket calls in a napalm strike.
 * Tripwire mines in the original Half-Life could be used this way. If one was willing to cheat to replenish the supply (as opposed to only having 5 at any one time), entire levels could be rigged into hilariously complex chain-reaction traps.
 * Clockwork Gennai from Oboru-maru's Live a Live chapter is one of these, he is the one who placed all the traps on the castle.
 * The Deception series of video games (including the most recent entry, titled Trapt in the United States) - the player character in each game is anywhere between 'mostly harmless' and 'completely helpless' in direct combat, but possesses the ability to create powerful magical traps. Gameplay mostly consists of setting up a lethal series of traps, and then standing around looking vulnerable in the right spot to lure enemies into the line of fire.
 * The Demoman class in Team Fortress 2 and its predecessors is based around planting sticky bombs to ambush opponents (when its not being played as a melee class).
 * The Engineer may count as well, particularly after it became possible to move fully upgraded sentries around or use an alternative weapon which granted him a smaller, but much cheaper and quicker to put up "mini-sentry".
 * Rachel Alucard in Blaz Blue fights with either slow moving projectiles (which she can use her special ability to blow into opponents) and by planting umbrellas in the ground to serve as a target for her Sword Ivis moves.
 * In Dissidia Final Fantasy, this is The Emperor's' modus operandi. It's even the title of his fighting style. He conjures energy crests that can paralyze opponents or shoot projectiles at them, or releases magical mines from his staff that draw the opponent in and explode. His Flare attack is a slow but large homing projectile that keeps the opponent dodging, and his trademark Starfall would be all but impossible to use if it weren't for his traps pressuring the opponent and buying him time.
 * Kefka partially counts as well. Waggle-Wobble Firaga similarly pressures the opponent with its constant tracking and threat of paralyzing the opponent, and Trine ensnares opponents that can't get away in time, which is great for punishing campers and those too greedy with EX cores.
 * Then there are rangers in Final Fantasy Tactics a 2, who are capable of laying (and disarming) traps.
 * Dragon Age features "trap making" as a skill and an engine that doesn't transition between screens when a battle begins, allowing players to use doorways, blind corners, stairways, and the like on the map as choke points, making it very possible to play as this kind of character if you know when fights are coming. You can even get a certificate of achievement for being an insidious user of traps.
 * The Vanquisher class in Torchlight is one of these. Her abilities involve dropping static traps that damage nearby enemies, compared to the Alchemist class' minions and the straighforward combat used by the Warrior class.
 * Some people play Dwarf Fortress exactly like this, but with added lava.
 * Minecraft sees a fair few automatic enemy-harvesting machines, too.
 * Not to mention TNT rooms... some players are themselves trap masters.
 * Dirty Duck from Metal Gear fights using traps and Human Shields.
 * Urien from Street Fighter III uses a shield which reflect projectiles and harms anyone who touches it. Typical mastery of his moveset involves pushing enemies to the corner and keeping them there with said shields.
 * Pokémon has the metal bagworm Forretress, capable of learning all the entry hazard moves (Spikes, Toxic Spikes, Stealth Rock). Gen V Expy Ferrothorn is also able to learn Spikes and Stealth Rock but not Toxic Spikes.
 * In Fallout: Tactics, Fallout: New Vegas and Fallout 3 Player Character can set assorted mines, booby traps and so on. It puts defused enemy mines to good use and tend to soften up tough opponents a lot even when they don't kill.
 * Testament of Guilty Gear, whose fighting style involves littering the battlefield with invisible webs in the air and planting demon trees on the ground that act like mines.
 * Bridget is a minor example as well. Opponents who don't keep track of where his yo-yo is set at any given moment are in for a world of hurt.
 * Chrono plays like this in Magical Girl Lyrical Nanoha A's Portable: TheBattleOfAces, releasing invisible Delayed Binds that would trigger and catch his opponent if they flew too close to them. He could either plant them in place or have them slowly follow his opponent.
 * Lock from Locks Quest has traps amongst his arsenal, along with walls, turrets, and minions, to fend off the enemy, making him this trope, The Minion Master, AND The Turret Master. But not a Wallmaster. That's something else entirely.
 * Guild Wars allows rangers to plant a wide assortment of proximity traps, and its sequel is giving necromancers some remote-mine magical traps and exploding zombies.
 * Little Big Planet's extensive level editor gives players the ability to become this.
 * From Sengoku Basara: Most of Motonari's movesets are about setting traps in some way or form. This includes a decoy that can be detonated or energy barriers that can bounce mooks between them for massive combos.
 * Aht from Radiant Historia is a powerful attack mage, but unlike other spellcasters instead of directly targeting her enemies, she lays "traps" of magical energy onto unoccupied spaces on the battlefield, relying on other characters (or herself) to push her enemies into them afterwards.

Tabletop Games

 * There was a whole series of Dungeons and Dragons supplements full of ever more fiendish traps, all hosted by a Troll named Grimtooth.
 * Some of D&D's most legendary classic adventures, including I6: Ravenloft and Tomb of Horrors, largely or entirely consist of a dungeon-crawl through the lair of a Trap Master.
 * In Pathfinder, there's a sun-class of the Ranger class called the Trapper, which gives up spellcasting in favor of learning how to quickly set up snares and other simple traps in combat. There's also a Rogue subclass called the Trapsmith, which specializes in disarming traps and building her own.
 * As much as the name suggests the Trap Master is not this trope.

Web Comics

 * This poster says it all: "How could 1 HD critter possibly be a threat?"

Western Animation

 * This is what Fred from the Scooby Doo franchise wants to be. Usually, however, his traps never work as intended. In Mystery Incorporated, the series' most recent incarnation, Fred's affinity for traps is exaggerated into a borderline fetishistic obsession. However, in this series, he actually is this trope and most of his traps actually do work fantastically, so the obsession may have it's good points..
 * One episode of Mystery Incorporated showcases the gang going up against a villainous Trap Master, with Fred treating him as a friendly nemesis.