Sounds a little like the aircraft (specifically helicopters) piloting rules from 1st ed (in Free City of Krakow). Your skill level dictated how many aircraft you were familiar with and you had penalties for trying to fly unfamiliar ones. Machines labelled in foreign languages the character was not familiar with attracted greater penalties.
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If it moves, shoot it, if not push it, if it still doesn't move, use explosives.
Nothing happens in isolation - it's called "the butterfly effect"
Mors ante pudorem
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