I think that in RPG contexts, the term has gotten a more specific meaning, and is often called "Pulp action" instead of "Pulp fiction". But as with anything, strict definitions are hard, and words should generally be considered magnets rather than boxes (instead of a definition with specific criteria where anything within those criteria matches and anything outside doesn't, magnet words provide a sort of ideal of what a thing is and the closer another thing is to that the better the match). For RPGs, I think the main pulp magnet is "Indiana Jones". You want lots of action, some time before WW2, exotic locations, moral clarity (but not necessarily perfection), and so on.