You need titanium bolts to unlock these skins.

  • Old School Ratchet: From 1st game (or free with save file from 1st game)
  • Snowman / 6 Bolts
  • Tuxedo Ratchet / 6 Bolts
  • Bugnoid / 6 Bolts
  • Brainius / 6 Bolts
  • Constructobot / 6 Bolts
  • Robo Rooster / 6 Bolts
  • Trooper / 5 Bolts
  • Robo / 5 Bolts