Assuming a lock is within the PC’s skill level, they will eventually pick the lock and get it open.
Searching for a trap and trying to disarm the trap both have a risk: you might blunder into the trap and set it off before you find it or disarm it.Originally, I wrote this long, rambling introduction about picking a role-playing system to run modern-era mystery games and about arguments with people about binary skill systems and why I personally prefer the freedom binary systems afford over things with narrative dice pools and hippie-dippie drama point bulls$&%. When you start looking at mystery gaming, most of the issues (apart from the big one about how to structure a mystery story) are really about using the game’s skill system to its fullest potential.But I realized it was just a bunch of garbage meant to forestall arguments about which game systems were superior and justify all of the great advice I am about to selflessly bestow on all of you. And the same techniques you use to run a great investigation apply broadly to just about any skill-based encounter or adventure in just about any RPG system. But I’ve never been above milking a topic until there is nothing but chalky, white dust issuing from a shriveled… I’ve always been willing to exhaustively explore the full scope and scale of a topic, splitting infinitives with reckless abandon as I go.My own D&D/Pathfinder/d20 roots will be on display, of course, but I am using the same skills in my Hackmaster 5E game. The DM can respond with an answer or ask for a specific roll.“Make an Arcane Lore check, but only if you’re trained.” “Yes.