If you're anything like me, you've been playing tons of Bloodborne. If you haven't been playing Bloodborne, you should be. It's what 3D castlevania games wish they could be. It's a character action game revolving around fighting horrific monsters that can drop you at a moment's notice. It's about mystery, exploration, and survival. Since I haven't beaten it, though, and since we all want to avoid spoilers, I thought I might propose something that simply shares a similar setting and tone. Our game will revolve around a group called The Royal Hunting Society...
A steampunk version of victorian-era London is the setting. The Royal Hunting Society (RHS) is a newly formed royal agency. They have a singular goal; hunt and destroy all manner of vile beasts that haunt the slums of London. When mankind unlocked the secrets of steam technology it was merely the first splash when the floodgates of knowledge opened. We soon knew things we were not meant to know, and all sorts of darkness was drawn to us. Otherworldly forces that lain dormant until we began digging to deep into the mysteries of the world began to surface. The poorer sections of the city where darkness reigns is more susceptible to these incursions. Armed with trick weapons and imbued with the blood of these creatures to give them supernatural power, the RHS stalks the dark roads, eliminating any foul beasts they may find.