This closed campaign (which is the continuation of a previous installment of the ongoing Team Ruby series which started on these forums) uses the Pathfinder 1st Edition ruleset, and as such, makes use of the following optional rules: automatic bonus progression at +2 level, consolidated group skills, consolidated skills ,staggered advancement, and wound thresholds.
Characters were built using 20-point buy, with no score being lower than 8 (other than through racial stat adjustments). Level progression is done using the medium table for experience (default). Paizo material allowed (unchained classes are standard) as were 3PP from Dreamscarred Press, Kobold Press (spell-less ranger standard), Legendary Games, and Rogue Genius Games. Characters also started with two traits, of which one had to be a Giantslayer campaign trait.
Finally, we're using a different kind of critical hit system, one derived from the mind of Sean K. Reynolds for use in his Five Moons RPG.