There are many posts and discussions about what can be achieved during one round, however, to the best of my knowledge there is no explanation as to how/why the number 6 was decided.
The question becomes more interesting considering that all of the RPGs I have played so far also consider each round to last 6 seconds.
I think it’s worth breaking this question into smaller ones:
- Who invented the 6-seconds round rule? Is it Gary Gygax?
- Why 6 seconds? For example, why not 5 or 7 seconds. In particular, 5 looks nicer and "rounder" to me.
- Are there any RPGs in which rounds last shorter or longer? Do they offer any explanation as to why?
- Does the game break if you change round duration? Let’s say that I make a house rule that rounds last 5 seconds. What’s going to happen?
p.s.1. I’m not sure which tags are most appropriate here. Please, feel free to suggest any for adding or removing.
p.s.2. I’m taking D&D as the baseline and assuming that all RPGs use the 6-seconds rule, this is why I’ve tagged the post with the