Konami vs. Gamesoft: World War 2000

Konami vs. Gamesoft: World War 2000 (コナミVSゲームソフト: ワールドウォー2000) is a crossover fighting game produced by Multisoft. It is the company's first collaboration with another company, and it features characters from both Konami and Multisoft games. It was available for Japanese and overseas arcades before being ported to the Sega Dreamcast and PlayStation 2, while it was remastered for the Xbox 360 in 2006 following the rebrand.

Gameplay
Konami vs. Gamesoft utilizes similar tag team-based game mechanics inspired by the Capcom Vs. series. Before the start of a match, the player selects a team of two fighters to compete in one-on-one combat. The player can freely swap between characters anytime during battle. While one character fights, their teammate resting off-screen slowly regenerates their life gauge. The first team to exhaust their opponent's vitality wins the match; however, if the timer runs out before either team is knocked out, the player with the most remaining health is declared the winner. The player also has their choice of "formula", or attack meter. The Gamesoft-Formula is based on Delta Cross 2, while Konami-Formula is based on the gameplay system from Martial Champion.

Game Modes

 * Arcade: The player will fight through several AI-controlled opponents until they reach the final boss, Gava.
 * Versus: Players will battle each other locally.
 * Training: Players can practice their battle skills.
 * Survival: Players will defeat as many opponents as possible, while maintaining their health.
 * Cross Frenzy: Various players can join in the game's Cross Frenzy phase.

Playable characters
Konami vs. Gamesoft features a roster of 22 playable fighters. Players can choose two of the 20 characters to form a team of their own. Alternatively, players may select one of two "giant" characters, who cannot be played as part of a team. The game also features 20 unplayable guest characters, drawn from the Konami and Gamesoft universes, which are used for support during battle. Guest characters from Konami include Vic Viper from Gradius, Mei-Ling from Yie Ar Kung Fu, and Bayou Billy, while the Gamesoft/Multisoft side includes the eponymous Red the Dragon, Byron Turner from Alien Killer, and Sasha from Skeleton Princess. The roster also contains six secret characters, which are accessed by inputting codes on the character select screen. Most of the secret characters are palette swaps of existing fighters with different moveset properties, such as Light Woman, a modified version of Judy Autumn; the sole exception to this trend is Kelly Valentine from the Superstar series.

Trivia

 * This game was designed to compete against Marvel vs. Capcom: Clash of Super Heroes.
 * Kelly's theme, "Aim for the Top!" was performed by Noriko Hidaka (well-known for Noriko Takaya from Gunbuster), who voiced her in the animated cutscenes of Superstar World (Japanese version) and the Superstar OVA "The Hunt for the Moon Nation."