Alias Spycraft sourcebook?
That would be great!
That said, my group are currently running through an Alias campaign using Room 39 from Shadowforce Archer instead of SD6.
One of the group is the "Bristow" character, with backgrounds in "Love Love" and "GM Fiat". Another is going to be like a field-operative Sloane, he's a faceman that acts really weaselly.
The best thing... None of the players have seen Alias! I'm letting them do missions for Room 39 to start trusting and believing but a few levels from now they'll be unsuspecting fools (except for the faceman).
Bow before the evil GC! Bwa ha ha ha!
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