Board Thread:Questions and Answers/@comment-6022633-20140512152130/@comment-26349751-20140515072824

You could buy:

Primary - Rambo's Rifle, Marksman M2

Secondary - skip this

Melee - Fire Demon, Emperor's Sword (if you're using android)

Special - Guerrilla Rifle, Prototype PSR-1

Premium - Gravity Blaster, Armmagedon, Golden Laser Cannon

If some of those are already yours, then ignore that.