Pass Test Tube training to unlock the Pro Weapon Scheme.
Get gold on To Boldly Go to unlock the Sinking Big Weapon Scheme.
Get gold on Hook, Line and Skimmer to unlock the Sniper Weapon Scheme.
Get gold on Hold Until Relieved to unlock the All Action Weapon Scheme.
Get gold on Beef Cake Breakfast Brawl to unlock the Sticky Wars Weapon Scheme.