No missable achievements (plus 8 unknown)
Sign in with Steam or Xbox to track your progress, and:
Find a Secret Area.
Light the Pope-Signal.
Find 5 Secret Areas.
Score at least 5000 points, total, from the Quest for the Laser-Nipples levels.
Touch 100 Black Stars.
Reach the Strip Club.
Recover the Laser-Nipples.
Beat Quest For The Laser-Nipples in one play session.