Dual chain gun:To unlock the dual chain gun, first select “Pickups” at the bottom menu. Scroll through items, then select the locked item, and enter “MEGASHOT” as a password.Achievements:ACHIEVEMENT – HOW TO UNLOCKEntirety (30 points) – You must play through all levels. Hard to Complete (220 points) – You must complete all levels on the Hard difficulty setting. Immortal (100 points) – You must play through all levels without dying in any level. Cosmic Combat (10 points) – You must play through the entire Cosmic Combat level. Deep Sea Danger (10 points) – You must play through the entire Deep Sea Danger level. Emperor