Quote:
Originally Posted by David Johnston2
Been there, done that as a player. The GM just kept rolling until I was caught.
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FWIW, I think this is a bad idea too. Even if you do it second by second, don't make them roll every turn. Roll when the circumstances change - they speed up, they close in significantly, the goblin turns to face them (changing what was a Stealth roll vs. Hearing to one vs. Vision), etc. Otherwise, if the circumstances don't change, just keep the one roll and go from there.
You could figure out the goblin's roll and the margin of failure, and as penalties accumulate (the PC sneaks closer) just see when it goes from "I don't hear you" to "I hear you" and snap into combat from there. But it's generally easier to roll against Stealth once based on where you're trying to get to (sneak up for a backstab, sneak past behind him, etc.) and see what happens.