In the beginning, there was Sepulchre: a free adventure for Windows approximately 30 minutes in length, featuring “horror, trains, and huge bags.”

Indie developer Owl Cave (2013’s Richard & Alice) and publisher Mastertronic have now come together to create The Charnel House Trilogy, also for Windows. This will be a point-and-click horror adventure consisting of Sepulchre bookended by two new games: Inhale (a prequel) and Exhale (a sequel).

The Charnel House Trilogy will build on the story presented in Sepulchre, adding twists, turns and some intriguing new characters. It will recount ominous events that take place one fateful night aboard a train bound for the mysterious island of Augur Peak (and terror).

Trilogy‘s co-developer and writer Ashton Raze: “Sepulchre has always been part of a wider story I wanted to tell. A number of my fiction works (interactive and non-interactive) take place in the same universe, so when Sepulchre was granted a Steam release, it seemed the perfect time to expand on the story I’ve always wanted to tell surrounding Old Gloria, and that fateful train journey as seen in the original game. Inhale, a very deeply personal story to me, existed in largely the same form since before Sepulchre was developed, and Exhale is the natural continuation of that. The new protagonist, Alex, brought to life amazingly by Madeleine [Roux, voice actor], is one of the most important characters in the canon, and my personal favorite. Hopefully people will get as much enjoyment out of playing her as I did writing her.”

Stuart Morton, Producer, Mastertronic: “Sepulchre returns in The Charnel House Trilogy and more chilling than ever. Beware and be ready. The Steam train will be arriving this April.”

If you’d care to whet your appetite as you await Trilogy‘s release, Sepulchre is still available here. And it’s still free.