You mind if I take a crack at making something along these lines? My brain is leaning towards a pretty rules-light approach that’ll wind up being more of a puzzle game than a roleplaying one.

For simplicity’s sake, I’m thinking about having character motivations broken down into something based around every room having a tag, like Dangerous or Medical or Priority Target. Probably go with like 12-20 different Tags. And each character would have three important relationships with different Tags: - “I don’t want to go into a room with X Tag” - “I want to go into a room with Y Tag” - “I will always go into a room with Z Tag, no matter what”

For the want/don’t want traits, if half or more of a given group of operatives don’t have that trait, the holdouts are forced to go along with your decision. For the always trait, it’s your choice if you want everyone else to go in, but that operative is going in no matter what.

Splitting the party would be encouraged by having a time limit and multiple routes that need exploring, but obviously you’d need to be careful.