OK, so this is likely something of a slow-lane question, so if there’s some “PBtA Clocks 101” reading I should do first, please do let me know! Extra credit if it’s in the form of the available SRDs, summaries, and freebies though – I’d rather not have to buy vast swathes of books just to satisfy potentially idle curiosity. For context, I’ve played in two different PbtA games, but neither was obviously clockish, and AW doesn’t really appeal to me as a setting, so I’m kinda very behind on my reading on Great-Granma System.
First, about Countdown Clocks specifically: I get the impression these are strictly a GM-facing tool? Are there any PbtA games that use – or any off-piste GMs that run them as – player-facing? If they are just GM-facing, can you talk me through why they’re an especially useful tool, as opposed to just bookkeeping that happens ‘behind the screen’ that for all the rest of the table knows, might just be getting winged on the spot?
Second, other types of Clock. (For PC harm, etc.) Is there a unity of mechanism here, or just a reused metaphor? And is the reuse itself useful, given the different ways these get used?