Gunfighter

Gunfighter by Bandai (released on December 30, 1980) is a classic, highly collectible handheld electronic game that recreates a Wild West duel. In Japan, it was famously released under the name FL Gun Professional (or Duel).

Two players sit side-by-side. Using directional buttons, you move your cowboy up and down to dodge shots while hitting the fire button to eliminate your opponent. You can also strategically shoot through the cactuses to clear a line of sight.