Gleylancer

Video Walkthrough. Text Below

You can get an easy 1000G by not even playing the game...

From the Main Menu select
Options...
Gameplay...
Gameplay Mode: Cheater
Press on the Cheater Mode and the option for Invincible & Debug Menu should appear.
Invincible: Enabled
Debug Menu: Enabled

Then go back and Start Game (Cheater Mode) then after the cutscene "PRESS START BUTTON" and you'll see another options menu.

Go into the second options menu and change
GAME LEVEL - EASY
STORY MODE - OFF
SHOT - AUTO
SPEED - MAX/4

Then start the game and change the Mover System to SEARCH and the gunners will aim at enemies automatically.

Next once you're in the game PAUSE and on the right side change GUNNER to 2. You have to use the right thumbstick to change it. Then change MISSLE to ON

From there the game will automatically play itself and unlock all Achievements along the way and you should have the full completion in around 40 minutes.