RWBY: Amity Arena

RWBY: Amity Arena is a mobile game developed by NHN Entertainment and published by Rooster Teeth on October 2018 for iOS and Android. A closed beta ran starting in August of that year. Based on the RT animated series RWBY, the game combines elements from collectible card games, tower defense, and multiplayer online battle arena.

Gameplay
The core gameplay of Amity Arena revolves around arenas where both players have three buildings, two turrets and a tower which fires beams. The player has 3 minutes to destroy the adversary's structures, with the turrets being worth one point each and the tower giving an automatic 3-point win even if only one or no turrets were downed. If when time runs out both players are tied, an extra minute of "Sudden Death" is played.

To attack the structures and defend from the adversaries, players deploy units based on the RWBY universe, ranging from the Huntsmen and Huntresses to the robots, goons and creatures of Grimm, with varied properties (physical attacks, projectiles, airborne units, and even special attacks). Each unit, represented by a card, requires a certain amount of "Aura" to be used, with the player's Aura meter charging as time passes.

Once a battle is won, the player wins trophies (their overall game score) and if they have a key (usually given every 90 minutes), can open a crate that can give new cards and currency - coins (used to purchase cards at the store or upgrade units which have enough cards to raise their levels), Dust (used to purchase crates or keys; it can be purchased with real money on the store), and cookies (used to purchase costumes for the units or emotes to send during battle to the adversary). Crates are also available by executing daily missions. There are eight arenas, split by the players' amount of trophies. Once the player arrives at a new arena, new cards are available to unlock.

Characters

 * Huntsmen
 * Ruby Rose: two versions, Scythe Ruby (spin attack, sometimes preceded by a jump) and Sniper Ruby (fires blasts, including a concentrated two-shot as her special attack)
 * Ice Weiss: along with stabbing with her rapier, her special attack temporarily freezes enemies and structures in a small area
 * Blake Belladonna: two versions, Ribbon Blake (can go anywhere when summoned, and her blade attack has a bonus against structures) and Shadow Blake (fires blasts, and as special attack leaves behind a shadow copy to bait enemies)
 * Yang Xiao Long: two versions, Biker Yang (punches enemies strong enough to make them bounce back) and Rocket Yang (fires blasts from her gauntlet shotguns)
 * Jaune Arc: attacks with his sword and has a high defense due to his shield
 * Pyrrha Nikos: attacks with her spear, and her special attack throws her shield like a boomerang
 * Nora Valkyrie: attacks with her hammer, and her special attack destroys low HP units and throws high HP ones flying
 * Lie Ren: attacks with his sickles, sometimes preceded by a fast dash
 * Sun Wukong: attacks with his nunchucks, and his special attack creates four copies that automatically go for the turrets
 * Neptune Vasilias: attacks with his trident, and his special attack allows for electrocutions
 * Coco Adel: attacks with her gatling gun, whose damage increases with each bullet
 * Yatsuhashi Daichi: attacks with his large blade, and when summoned impacts an area with enough strength to destroys low HP units and stall high HP ones
 * Nolan Porfirio: attacks with his cattle prod, whose shock temporarily stalls adversaries and structures
 * May Zedong: attacks with her sniper rifle
 * Flynt Coal: attacks with his trumpet weapon, whose special attack stalls and destroys every unit in the blast area
 * Crow Qrow: attacks with his scythe, and his special attack turns him into a crow that can fly anywhere in the arena
 * Glynda Goodwitch: attacks with her baton, and her special attack creates mini-turrets that attack nearby enemy units
 * Penny Polendina: attacks with throwing swords, and her special attack creates a striking zone of flying blades anywhere in the arena
 * Villains
 * Roman Torchwick: attacks with his cane, and his special attack makes him pull an enemy towards him and beat it repeatedly
 * Emerald Sustrai: attacks with her sickle guns, and her special attack creates a phantom image of a nearby unit
 * Parasol Neo: attacks with her parasol, and has two HP bars, with her attacks being stronger in the second one (which starts right away by aiming at a structure or the strongest unit)
 * Xiong Family: two goons with axes, followed by Junior with a bazooka
 * Thugs and robots
 * White Fang Goons: sword-wielding goons
 * White Fang Shooters: three rifle-wielding shooters
 * White Fan Squad: a combination of five units from the above two types
 * White Fang Dropship: Once it arrives at the structure, drops five Goons
 * AK-200: two shooter droids
 * AK-130: four sword-wielding droids
 * Spider Droid: a four legged droid with a massive cannon
 * Atlesian Paladin: big mecha that only attacks structures
 * Atlesian Airship: drops two AK-130 in regular intervals
 * Grimm
 * Ursa Major: slow but strong and durable bear Grimm that only attacks structures
 * King Taijitu: snake Grimm that both attacks with its heads (even airborne units) and snares in units which it then constricts
 * Nevermore Chick: a big raven Grimm whose attack strikes everything hit by its wingspan
 * Baby Death Stalkers: eight small scorpion Grimm who attack quickly
 * Boarbatusk: a boar Grimm who when not bashing nearby units, strikes with a rolling attack
 * Lancer Swarm: wasp Grimm who shoot stingers, varying from three to six units
 * Griffon: a griffin Grimm who pecks enemies
 * Alpha Beowolf: a fast wolf Grimm who charges towards the structures and leaps
 * Petra Gigas: a rock monster built by a ghost Grimm, who attacks by punching and once defeated collapses damaging nearby units
 * Beringel: a gorilla Grimm with a jumping attack

Locations

 * Beacon Academy (Arena 1)
 * Emerald Forest (Arena 2)
 * Forever Fall Forest (Arena 3)
 * Mountain Glenn (Arena 4)
 * Vale City Square (Arena 5)
 * Beacon Academy Tower (Arena 6)
 * Oniyuri Village (Arena 7)
 * Mistral Village (Arena 8)

Trivia

 * Introductory sentences are spoken by the eleven units based on the main characters, plus Junior Xiong and Neo (although the last one said by Torchwick given she's mute).
 * Ruby and Blake's two units reflect their costumes before and after Volume 3. Weiss only has her Volume 4 getup, while Yang's units are both up to Volume 3 (her regular outfit in Rocket, and the Hunter suit in Biker).
 * Nora had a special costume with an RTX shirt for those who attended the Amity Arena booth in the 2018 convention.
 * For Halloween, the structures had floating Jack O'Lanterns above them.
 * For Christmas (or "Non-Specific Winter Holiday" after the RWBY Chibi episode), the turrets were replaced with snowmen and the tower with a Christmas tree, and it snowed in every arena. Christmas-themed costumes were also available for purchase.
 * The introduction for new players has Yang spewing many awful puns, just like her voice actress Barbara Dunkelman.
 * In-jokes appear in many of the descriptions, such as the Griffon and Roman ones referring to how the villain ended up devoured by said Grimm as he monologued. RWBY Chibi is often referenced: Shadow Blake mentions "Ninjas of Love", where Ruby discovers the books Blake likes to read are "Filth"; the Alpha Beowolf and Petra Gigas have quotes from "Inner Lives of the Beowolves"; and Neo has a reference to her assessment of Roman in "Mysterious Red Button".