Project Nemesis is a fan driven website for games that use the One-Roll Engine (like Nemesis, Wild Talents, Reign and Monsters) or Chaosium's Basic Roleplay System (BRP) (like Call of Cthulhu) and the Delta Green setting.
I love Delta Green and consider it one of the best supplements of the
1990s, and if anything, Countdown is better. However, I also have to
admit that the sourcebook -- like its cousin Conspiracy X -- has
largely been made irrelevant by current events.
With the success of the limited edition of Delta Green: Eyes Only and
its upcoming release to distribution, Pagan Publishing and Arc Dream
Publishing are working together on a new collection for Delta Green. Delta Green: Targets of Opportunity will feature all new resources,
including some material that we've all wanted to see since the
earliest days of Delta Green.
As both systems - Dark Heresy and ORE (one roll engine) - are percentile based the conversion is quite easy. Below or my rules for character generation:
All Stats start at 2d. (Cost 24d)
For most PC's roll 12d. Then discard any 2d. (Cost 30d)
Pick upper or lower path for all sets.
Pick which table for each single die.
Then each player gets up to 6d of skills or stats to assign. (Total cost 60d)