Dark Children is a campaign for The Babylon Project.
Dark Children is more a proof-of-concept set of missions than an actual campaign, but that said, it's well worth playing through. It uses several "new" features not seen previously in other campaigns, including in-mission jumping and a version of the "bullet time" made famous by the Matrix movies, and it is certainly set from a unique viewpoint.
The campaign was writen and fredded by Vidmaster. It's fully voice-acted (with Vidmaster speaking all characters).