Successfully complete the indicated task to unlock the corresponding
costume in the safehouse closet:

Champion's Jacket: Win a TIR episode.
Convicts: Kill ten psychopaths.
Dealer Outfit: Change into all available pieces of clothing,
except locker items.
Hockey Mask: Use all melee weapons on zombies.
Tattered Clothes (/Shaun Of The Dead/ outfit): Kill 1,000 zombies
using hand-to-hand combat.
TIR Helmet: Earn $1,000,000 in TIR Online.
TIR Outfit: Earn $5,000,000 in TIR Online.
Willemette Mall: Rescue 50 survivors.