Following an incorrect but well-meaning outside submission trying to make the lightgun work in Golgo 13 (Eighting/Raizing/Namco 1998) I dug into the problem and got it working properly, which makes the game fully playable. For the unfamiliar, it’s sort of a cross between the sniper gameplay of Silent Scope (there’s a ‘zoom’ button rather than 2 screens) and the timed minigames of Point Blank (you have only a few seconds to pull off a shot properly before the stage ends).