This is not a complete solution, but I think that I can offer a useful tip for those who, like me, are having trouble with the core defense at the end of the game.
BEWARE, THERE COULD BE SOME SPOILERS:
- If you can afford it, buy
"return to sender for less" in the vending machine before the fight. If not, don't worry. It's not essential, but it's helpful.
- When the fight starts,
stick a bunch of Return To Sender traps (holding LT)
on the front of the core like this crappy quality picture shows:
-
This will make the core almost invulnerable, therefore making the fight A LOT easier. This way, you can allow the enemies to focus their fire on the core, and you can destroy them from behind easily, or even use Songbird on them.
Rockets do damage the core a little, so focus on RPG infantry and cannonner ships first.
- Keep an eye on the core, and if the traps start to dissapear, throw some more. Also, if an enemy gets near the core the traps will explode, so be careful with that too.
Hope this is of some help, and sorry if there's any grammar mistake, english is not my mother language. Also, if someone has a way to improve this solution, just comment ;)