To put simply. Collect ALL Ripleys letters by completing each continent mode, this is activated by hitting the VariTarget when it s lit. You MUST listen to the Shrunken Head as this will tell you the main objectives and what to shoot for.
There are lots of other distractions to achieve, but this is the main objective.
Absolute ball tearer of a game and I am STOKED to own one.
I have NEVER achieved Atlantis or Frog Frenzy, one day!