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Official Site: Capcom

Plasma Sword: Nightmare of Bilstein, also known as just Plasma Sword, and released in Japan as , is a 1998 3D weapon-based fighting video game released by Capcom for the arcades. It is the sequel to Star Gladiator and runs on the ZN-2 hardware, an improved version of the PlayStation-based ZN-1 hardware its predecessor ran on. A Dreamcast port was released in 2000.

The control system from the first Star Gladiator was reworked and rebuilt for the sequel. Much like the first game, players are given an arsenal of four usable buttons. Two of the buttons are attacks for a fighter's weapon while one button is used for a kick attack and the final button is used for inward and outward sidesteps as well as dashes. The Plasma Combo System was discarded in favor of the Plasma Strike System, in which all characters have a Plasma Gauge (similar to the ones found in Street Fighter and Darkstalkers) and that they can store up to three levels of the Plasma Gauge, enabling them to pull off super moves called Plasma Strikes. Unlike the first game, fighters are able to battle on an endless 3D plane field, meaning that ring-outs were unavailable from within sight. Like other 3D fighting games, set combos were implemented through tapping a specific sequence of buttons. However, characters could perform special moves from within the combos themselves, akin to 2D fighting games (similar to the treatment found in the Street Fighter EX series). Characters can also counter incoming attacks using a Plasma Reflect or Plasma Revenge tactic against their opponent, requiring at least half of a Plasma Gauge level.

One new tactic introduced from within Plasma Sword is that characters were granted a unique special skill called a Plasma Field. With the use of one level from the Plasma Gauge, the character who activates it will emit a sphere of Plasma energy around them. If the opposing character is hit by it, the 3D plane field will be temporarily boxed in with four invisible walls, making escape from the Plasma Field quite difficult. The effects of the Plasma Field vary with each character, ranging from infinite Plasma Strikes, growing to gigantic sizes, and even stopping time.

With the exception of Rimgal and Kappah, the remaining characters of the original Star Gladiator return for the sequel. The ten returning characters are joined by fourteen new characters, of which ten are considered "mirror images" of the returning ones, while the remaining two new characters have their own unique fighting styles. The ten "mirror image" characters share the same weaponry, attacks, and Plasma Fields of the original cast, but each "mirror image" character has their own unique Plasma Strikes, character designs, and original stories. There are two sub-bosses/secret characters from within the game and both of them can only be played through the use of their own codes.

Blood (Plasma Sword) has not been a contender in any CBUB matches.