Demon: The Fallen Edit
Demon: The Fallen refers to Abel, not as a murder victim, but as the first human to step forward and declare allegiance to God rather than Lucifer and the rebellious Elohim. One-fourth of humanity followed him. His eventual murder at his brother's hands is what sets off the Time of Atrocities.
Vampire: The Masquerade Edit
The Book of Nod refers to Abel, in the eye's of Caine as a man who was bright, sweet and strong. The second-born son who tended the animals and sacrificed the best youngling upon an alter to his "Father". In turn, Abel was "sacrificed" by his brother Caine. Caine felt that offering Abel's blood would be his best sacrifice, as this action was justified out of love, especially since his prior offerings were not accepted.
It is revealed late in the metaplot, as the forces of Grandmother and the Malfeans rage against each other in an attempt to control the Shadowlands, that Grandmother is actually hiding something in a distant, but heavily guarded Memory Tower. A group of ghosts is sent to investigate; after making their way though the tower, they find a wraith, wrapped in a white shroud and chained to a memory strut that forces him to constantly vanish and reappear. When they reach him, they free the wraith, who thanks them and introduces himself as Abel.
How close to the Biblical Abel this wraith is cannot be determined, but he knows enough to tell them he is the first murder victim. He explains because of the concept and load of him being the first of many whose lives were ended early, he actually serves as a one-way valve from any part of the living world to any part of the Shadowlands, including directly to Grandmother herself, if so desired. If he does this in such a way that the characters can direct a large channel of the very force of life through this twisted nihil, they can quiet, or possibly vanquish, Grandmother. How this is done is left up to their imaginations.
- , The Chronicle of Caine, p. 7