Baldur’s Gate 3 may be much bloodiest than you could have suggested, since the serial killer is one of the origin that you can use for your character. This origin is called "Dark impulse" (Dark Urge), and following this path, you can create any combinations of the Avatar race/class, and not limit yourself to a certain type of character.
Those who played Baldur’s Gate 3 were limited by the default avatar, but in the final version of the game a system of origin will be used, similar to the one used in Divinity: Original Sin 2, where you can play for one of your party members and turn it into the main character. Among the confirmed originals for Baldur’s Gate 3 are Astarion, Gail, Karllae, Lae’zel, Shadouhart and Vile, as well as a user original, which allows you to create a character from scratch.
The last origin for Baldur’s Gate 3 was disclosed during the final event Panel from Hell. The final origin, called Dark Urge, implies that the character fills the desire to commit a murder. Judging by the advertising illustrations, they are manipulated by a strange creature in a hat.
Dark Urge differs from other origin with its style of game, with its own plot rhythms and narrative. The thing is that the character is forced to commit evil acts that he can resist. In this game, the character can make terrible acts of violence, including tearing the hands of Gale when he reaches for you in the early stages of the game.
One of the claims to the original Baldur’s Gate games was the lack of support for evil party members. Larian Studios turned the situation, since the game has many options for evil characters and their allies. Baldur’s Gate 3 is already a noticeably more gloomy game than its predecessor, and the Dark Urge path can let you tell one of the most evil Dungeons stories & Dragons today.