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.
There are many more features to narrat, see more on the website
There is an online demo. It contains a built version of the narrat demo example game.
Games are written in narrat script files.