All-Stars Chaos

X is turn-based RPG featuring characters from Namco, Capcom, Sega and Konami. The game was released worldwide on May 26, 2006.

Storyline
The year is 20XX, and the game is driven by the characters Azusa Reiji and Xiaomu. (new characters created specifically for this game.) The two of them work for a special unit called Shinra and they are tasked with investigating spirit and otherworldly disturbances. They are initially investigating a strange "Sleeping Sickness" in the Shibuya area of Japan, when it becomes apparent that something much larger is at stake. Characters both good and evil from other times and other worlds begin appearing in Japan 20XX.

Namco

 * Bravoman (Bravoman)
 * Guntz (Klonoa Heroes)
 * Gilgamesh (Tower of Druaga)
 * Hiromi Tengenji (Burning Force)
 * Jin Kazama (Tekken 3)

Capcom

 * Bruce McGivern (Resident Evil Dead Aim)
 * Chun-Li (Street Fighter)
 * Demitri Maximov (Darkstalkers)
 * Felicia (Darkstalkers)
 * Fon-Lin (Resident Evil Dead Aim)

Sega

 * AiAi (Super Monkey Ball)
 * Amigo (Samba de Amigo)
 * MeeMee (Super Monkey Ball)
 * Shadow the Hedgehog (Sonic Adventure 2)
 * Sonic the Hedgehog (Sonic the Hedgehog)

Konami

 * Moai (Gradius)
 * Powa Pro-kun (Jikkyō Powerful Pro)
 * Simon Belmont (Castlevania)
 * Solid Snake (Metal Gear Solid)
 * TwinBee (TwinBee)

Namco Cast

 * Ben Disken - Guntz
 * Wendee Lee - Hiromi Tengenji
 * Rob Paulsen - Bravoman
 * Brad Swaile - Jin Kazama
 * Eric Vale - Gilgamesh

Capcom Cast

 * Laura Bailey - Chun-Li
 * John DiMaggio - Bruce McGivern
 * Richard Epcar - Demitri Maximov
 * Jennifer Hale - Felicia
 * Tara Strong - Felicia

Sega Cast

 * Steve Blum - Shadow the Hedgehog
 * Jason Griffin - Sonic the Hedgehog
 * Tom Kenny - Amigo
 * Wendee Lee - MeeMee
 * Tara Strong - AiAi

Konami Cast

 * Jeff Bennett - Simon Belmont
 * David Hayter - Solid Snake
 * Tom Kenny - Powa Pro-kun
 * Maurice LaMarche - Moai
 * Scott Menville - TwinBee

Gameplay
The game is a hybrid between an RPG and a fighting game in that stages begin with a dialog sequence as characters confront one another before moving on to an isometric grid-based battle system. When you choose to attack an opponent, the game switches to a 2D side view screen where directional button inputs determine the particular attacks and movements performed.