Vidmaster Challenge: Brainpan

Vidmaster Challenge: Brainpan is an achievement released with TU2, in which you must find all the hidden Skulls on the Mythic maps.

This particular Vidmaster achievement is worth the sum of 25 gamerscore, unlike the other Vidmaster Achievements, which are worth zero gamerscore. You will also get Recon Armor if you get all the Vidmaster Challenges, but you must first get all the Vidmaster challenges included with Halo 3:ODST.