If you want the cars you must collect 45 egg things.(each cost 15) Next go to the menu and go to secrets.After you've done that scroll down to vehicle upgrades.then you go to the car u want and click on it and press buy.

actually desert screamer is like 20 precursor orbs but yeah, ^ that guy has the right idea
lol

continue on in the game an evenrtuaualy obtain it in secrets menu

i have 604/600 orbs wont let me by desert screamer... wdf

First you'll have to beat the game in order to be able to do all the missions so you don't
have to do anything.

you get the secret when you do the amount of missons. By the way it shoots missles

you guys are the best6 thankyou so much fo telling me i just completed the game today and
thought huh???

I have beat the game 100 time so it is no problem for me