Star Wars: Masters of Teräs Käsi is a weapon-based 3D fighting game developed and published by LucasArts for the PlayStation on October 31, 1997.
Set in the Star Wars universe (sometime after the first film in the original trilogy), players can duke it out with various characters from the series in locales from the films (such as Hoth, Dagobah, and Cloud City).
The story revolves around Arden Lyn, a master of an ancient martial art known as "Teräs Käsi" (which is actually Finnish for "steel hand") hired as an assassin by the Emperor of the Galactic Empire to take out key members of the Rebel Alliance. As the game is non-canon, it also includes nods to other characters in the expanded universe (including Mara Jade and lesser-known bounty hunter Jodo Kast).
Along with including the classic characters and locales, Masters of Teräs Käsi is known for its weapon-based combat, as players can toggle (on-the-fly) use of their character's particular weapon (either blasters, staffs, and lightsabers) and change their moveset. This is the only traditional fighting game developed for the series (not including the guest appearances in Soulcalibur IV).
The game includes twelve playable characters, four of which must be unlockable. Each of the characters can be classified by the weapon they can equip (with the exceptions of Arden Lyn, who does not equip any weapon, and Thok, who is always equipped with a battle axe).