Billionaire Philanthropist 40G
Collect 1,000,000,000 studs (Single Player)

How To
To unlock this achievement, you should equip all of stud multiplier Deadpool bricks. The stud multipliers will increase the value of the studs you collect, if you equip all 5 multipliers at once you should get to 1,000,000,000 in no time. For this achievement to unlock you must have all 1,000,000,000 studs at once. This becomes exceptionally easy once you have all the Deadpool red bricks. With all of the ones related to studs enabled in addition to the 2x multiplier, you can get a x3840 multiplier. With this, earning a billion studs can be done in one story mission. Otherwise, use whatever multipliers you have unlocked and collect all the studs you can find.

x2 multiplier - use UZFBG4. Can also be purchased for 1,000,000 studs.
x4 multiplier - use a telekinesis character in Tabloid Tidy Up to rearrange the trophies in the back office to unlock the brick. Costs 2,000,000 studs.
x6 multiplier - use a telekinesis character in Feeling Fisky on the picture of the Kingpin on the back wall, then use a laser/fire character to destroy the golden door to unlock the brick. Costs 3,000,000 studs.
x8 multiplier - use an electric character to start a transformer in Reptillian Ruckus followed by a magnetic character to open the container to unlock the brick. Costs 4,000,000 studs.
x10 multiplier - use a telekinesis character in House Party Protocol to break the piata using an object that is within a gold object behind the piata. Costs 5,000,000 studs.