From the steam page:
So turn those off and just leave the mission and extras content I guess.
Edit: I'm sure the credits + prasis are the "Augmented Covert Agent Pack" I don't know if the gear has stats or not (?) but it's probably safer just to turn if off I guess.
Yeah I only left the extra mission and the extra content (soundtrack, etc) checked. I don't want the extra money or praxis making things easier for me at the start.