Finish the Grand Canyon.
Finish Mesa Verde.
Finish Area 51.
Finish Hoover Dam.
Finish Meteor Crater.
Finish San Francisco.
Collect all Sumo Slammer cards in San Francisco.
Finish Lumber Mill.
Collect all Sumo Slammer cards in Lumber Mill.
Finish Crater Lake.
Finish Seattle.
Finish Yellowstone.
Finish Effigy Mounds.
Finish Plumber Base.
Finish Chicago Lake Front.
Finish Gold Coast Theatre.
Finish Mt. Rushmore.
Finish Historic Battlefield.
Finish Bayou.
Finish New Orleans.
Finish Oil Refinery.
Finish Riverboat.
Finish Washington D.C.
Finish Cape Canaveral.
Finish The Merciless.
Finish The Null Void.
Collect all Sumo Slammer cards in the Grand Canyon.
Collect all Sumo Slammer cards in Mesa Verde.
Collect all Sumo Slammer cards in Area 51.
Collect all Sumo Slammer cards in Crater Lake.
Collect all Sumo Slammer cards in Effigy Mounds.
Collect all Sumo Slammer cards in the Plumber Base.
Finish Plumber Base with an A rank on Hero difficulty.
Collect all Sumo Slammer cards in Chicago Lake Front.
Collect all Sumo Slammer cards in Historic Battlefield.
Collect all Sumo Slammer cards in the Bayou.
Collect all Sumo Slammer cards in New Orleans.
Collect all Sumo Slammer cards in Washington D.C.
Collect all Sumo Slammer cards in Cape Canaveral.
Finish the Grand Canyon with an A rank on Hero difficulty.
Finish Mesa Verde with an A rank on Hero difficulty.
Finish Area 51 with an A rank on Hero difficulty.
Finish Hoover Dam with an A rank on Hero difficulty.
Finish Meteor Crater with an A rank on Hero difficulty.
Finish San Francisco with an A rank on Hero difficulty.
Finish Lumber Mill with an A rank on Hero difficulty.
Finish Crater Lake with an A rank on Hero difficulty.
Finish Seattle with an A rank on Hero difficulty.
Finish Yellowstone with an A rank on Hero difficulty.
Finish Effigy Mounds with an A rank on Hero difficulty.
Finish Chicago Lake Front with an A rank on Hero difficulty.
Finish Gold Coast Theatre with an A rank on Hero difficulty.
Finish Mt. Rushmore with an A rank on Hero difficulty.
Finish Historic Battlefield with an A rank on Hero difficulty.
Finish Bayou with an A rank on Hero difficulty.
Finish New Orleans with an A rank on Hero difficulty.
Finish Oil Refinery with an A rank on Hero difficulty.
Finish Riverboat with an A rank on Hero difficulty.
Finish Washington D.C. with an A rank on Hero difficulty.
Finish Cape Canaveral with an A rank on Hero difficulty.
Finish The Merciless with an A rank on Hero difficulty.
Finish The Null Void with an A rank on Hero difficulty.
Finish Secret Challenge #1 on Hero difficulty.
Finish Secret Challenge #2 on Hero difficulty.
Finish Secret Challenge #3 on Hero difficulty.
Finish Secret Challenge #4 on Hero difficulty.
Finish Secret Challenge #5 on Hero difficulty.
Unlock all combo upgrades for Four Arms.
Unlock all combo upgrades for Heatblast.
Unlock all combo upgrades for XLR8.
Unlock all combo upgrades for Cannonbolt.
Unlock all combo upgrades for Wildvine.
Unlock all concept art in the Extras menu.