Toaru Majutsu to Kagaku no Puzzdex

Toaru Majutsu to Kagaku no Puzzdex (とある魔術と科学の謎解目録（パズデックス）), translated as A Certain Magical and Scientific Puzzdex is an action puzzle video game for iOS devices, Android devices, and mobile phones, featuring characters from both Toaru Majutsu no Index and Taru Kagaku no Railgun. It was planned to be released in February 2014 for Android devices and March for iOS devices, though it was later moved to an unknown time.

Gameplay
The gameplay looks similar to , where game is split-screen, with a role-playing game at the top where the player apparently gets to fight other chibi-fied characters from the series. There would also be character cards reminiscent of Toaru Majutsu no Index Struggle Battle. The game uses chibi-fied version of the characters from the series. Teams of characters can be formed and a copy of the character with a different color scheme can be found if the opponent already has that character in their team. Bonuses, known as "Party Skills" can be formed depending on the characters used in the party. For example, having a team consisting of four or more characters from Toaru Kagaku no Railgun, initiate the Railgun party skill, allowing for greater damage.

The objective of this game is to swap a tile with an adjacent tile to form a horizontal or vertical chain of three or more gems of the same type, which then does damage to the opponent. Tiles disappear when chains are formed and tiles from the top fill in the gaps. Sometimes chain reactions are tirggered where chains are formed by the falling gems. These chains allow for greater damage on the opponent. There are 5 types of tiles but sometimes special tiles appear on the screen. Defeating an opponent allows the player to gain experience. Like an RPG, players can only do any action after some time has elapsed or if they use a special item. Health bars appear next to a character and they are depleted when they take damage. The game uses stages based on locations from the series.

As it is a social game there are also events that allow the player to compete with others as well as raid boss fighting with cooperation with other players. Players can also have other players' characters in their own party and exchange gift items. Rankings of the players are also present.

Event Stages
Apart from the regular stages, there are also special event stages, some that are only available for a certain amount of time. Examples of this are stages that increases a particular attribute of the characters occur during the stage, strengthening stages that allows for better experience gain, and Cosplay Stages that incorporates the "charm" of the female characters. This forces the player to organize their team wisely.

Utopia Stage
When the favoribiity of a character increases, it will be released to the "Utopia Stage" for playing by touching the screen as a special reward, sexy card illustrations drawn from the series of the character. It is still unknown however how to increase to gain the favoribility of a character.

Characters
List of characters appearing in the game:
 * Accelerator
 * Agnese Sanctis
 * Aogami Pierce
 * Himegami Aisa
 * Index
 * Itsuwa
 * Kamijou Touma
 * Kanzaki Kaori
 * Kazakiri Hyouka
 * Kihara Amata
 * Kongou Mitsuko
 * Last Order
 * Misaka Imouto
 * Misaka Mikoto
 * Misha Kreutzev
 * Musujime Awaki
 * Sasha Kreutzev
 * Saten Ruiko
 * Sherry Cromwell
 * Shirai Kuroko
 * Stiyl Magnus
 * Tatemiya Saiji
 * Tsuchimikado Maika
 * Tsuchimikado Motoharu
 * Tsukuyomi Komoe
 * Uiharu Kazari
 * Vento of the Front
 * Yomikawa Aiho