Best weapon - The two best weapons are the missiles and the small cannons. Make sure you upgrade them till the last. Don't forget to upgrade your shields.

Easy kill - To kill your enemies faster upgrade your blasters full and then you do this - (make sure you are a person with accuracy) just aim your blasters at the enemies and keep moving Left -Right.

Mark III suit - Play level 2, "White Sands".

Research Points - Perform various in-game tasks.

Unibeam exact aim - To aim the unibeam exact first just tap the unibeam charge icon when playing a mission(do not press and keep it,just give it a small tap). It should charge and say unibeam ready. Then touch the side on the touch screen you want the unibeam to be released and it will do the rest of the damage...