[Update]: Cult of the Lamb's first major update has added post-game progression with revamped bosses, new abilities and items.
If you're in the mood for something a little bit out of the ordinary, you might want to check out the recently released Cult of the Lamb. It's an action roguelike where you'll have to slowly grow your cult by venturing across the world in search of resources to collect and non-believers to smite, building new structures and welcoming new members into the fold, and naturally, conducting dark rituals in order to appease an eldritch god.
Since all of that sounds like complete and utter nonsense, allow me to share with you the gameplay overview trailer. It'll give you a pretty good idea of just what Cult of the Lamb is trying to do. Have a peek:
While Cult of the Lamb is a good deal of fun, it's also well worth mentioning that the replay value is currently quite low. This is partly due to how little you can truly alter your playstyle, and partly because the difficulty level is fairly tame, especially when compared to how powerful you can become.
So if you're looking for a roguelike that will last you hundreds of hours, I'm afraid you won't find that here. On the other hand, if you're okay with short but sweet experience, Cult of the Lamb is well worth a closer look.
You can do so, as well as check out some of the player reviews, over at Steam. Enjoy!