Analysis of information sources in references of the Wikipedia article "Yie Ar Kung-Fu" in Portuguese language version.
Konami’s Yie Ar Kung-Fu (1985) added a variety of punch and kick maneuvers, each activated by moving the joystick in a specific direction—an innovation that would be greatly expanded by later games—as well as a “health bar” that indicated a player’s relative strength. Capcom Co., Ltd.’s Street Fighter (1987) introduced a more elaborate set of special moves, though all of these 8-bit arcade consoles suffered from underpowered computer chips and poor control sticks that made it difficult to execute the precise sequences needed for special combat moves.
