The Vagabond is an evil creature in the original Alone In The Dark video-game and is a servant of the Goat With A Thousand Young, a Lovecraftian god - which sends the Vagabond to kill those that displease it: the Vagabond haunts a library where it can walk through solid obkects and pursues the hero in an attempt to kill him on behalf of the Old Ones and thus stop him from undoing their evil deeds.

Ultimately the Vagabond is apparently slain with the aid of a ceremonial dagger (though he may still be alive as the text states the dagger sends him back to his native dimension, implying eh can not truly die (which, given his connection to the Old Ones, would make sense).