1181 is one of the best horror Interactive Fiction games out there right now.
It starts out simply. You are a volunteer at a SETI lab, working the night shift. It can be monotonous work. Some of your colleagues seem to be struggling to adjust to the sterile nature of the place. Not even you are sure what is really going on at the lab. One night, something strange happens. The lights go out. A voice announces that you are on lock down. And something is coming up the stairs and heading straight for you.
The is a well-written and well-programmed Twine game that makes good use of visuals. Like most Twine games, it does run the risk of getting repetitive. Be careful about accidentally clicking the same word that you clicked before unless you really want to go through the same descriptive passage two times in a row. When played straight through, it’s a challenging and thought-provoking work of interactive fiction. It comes with multiple endings, some of which are good and some of which are definitely not.