The Ritual

The stars are right, the bloodmoon has risen, your sacrifice is strapped to the altar and your robed acolytes are prepared for the grand summoning. 

And you, well, you know pretty much how it's supposed to go. But the final few steps are vague. Still, gotta give it your best shot, right?

"The Ritual" is a short interactive fiction game in which you are the leader of a cult dedicated to some Lovecraftian monster-god. You're just doing your very best. The game has multiple endings, most of which you survive.