In 1981, Bill Hogue wrote Robot Attack
, a variation on the arcade game Berzerk
. Unlike most TRS-80 games, in Robot Attack
you can move and fire in all directions. You fire in a direction by moving the joystick in that direction and pressing the FIRE button. This shows up a problem with the STICK-80 mapping; how can a game determine if the player was moving the joystick up or down and firing if the FIRE
button is mapped to a combination of UP
In October 1981, Alpha Products created a new version of their joystick which included a mode switch to allow a choice between the STICK-80 and TRISSTICK FIRE
button behavior. The advertisements from then on referred to the joystick as the Alpha Joystick, and the price remained at $39.95.