Narrat is a game engine for making interactive narrative RPGs packed with features.. Create your game by editing with a Simple scripting syntax. It supports Skills with skill check rolls, an Items inventory, and has a Quests System. The script system is very powerful and allows branching choices, functions, variables and conditions.
More info on the narrat website. There is an online demo available to try in the browser.
See the full readme in the narrat package folder