PDF. 43 pages. Black & White art.
This document contain notes and stats for both the In Nomine RPG and GURPS: In Nomine. By extension, it could be used with any GURPS game. Despite the publication date (2005) I think this is all for GURPS 3rd Edition. But I could be wrong. Just checked, yes GURPS 3rd Edition.
This supplement features all the strengths of most good GURPS supplements. That is there is a ton of information here, some stats, and a lot of great fluff.
This one also gives us the history of Lilith and what she has done in her immortal life. In the In Nomine game she seems to be one of the few immortals that can move between the devils and angels with some relative ease.
While I have not touched In Nomine in over 20 years (much to my own disappointment) there is a lot of great material here and makes want to dig up my old copy (if I still have it). In any case, true to the nature of GURPS this booklet can be used just about anywhere. There is nothing here that could not say be combined with Revelations of the Dark Mother. Where there are contradictions...well only Lilith herself knows the truth and true to her nature there are likely to be thousands of contradictions.
While this might not have the art that RotDM has, it does have plenty of game material.
Lilith should be wonderfully complex in any game and this supplement helps with that.