A few candidates for this one, but I think I’m going to go with Created.
Promethean: the Created was a strange game that took some effort to understand. A game of monsters trying to be human by emulating them. In the Isles of Darkness, I played Rocker, a Frankenstein on the Path of Tin struggling to communicate with other people and lashing out with violent lightning when he couldn’t find any other way to let things out. Unfortunately, being one of the smaller games in the IoD, it suffered for want of storytellers and eventually all of the games closed, leaving Rocker’s story unfinished. Still, he got some good music and lightning in before he died.