beat it. really fun, btw, when you cant rebuild a barricade, it's because a gargoyle or w/e that damn flying thing is suicided bombed that barricade, therefore not letting you rebuild.
Okay, first off, all you people complaining about the runners, they are easy as hell to kill, simply run from them and as you run, throw down a barrel, turn around, shoot it, BOOM, you kill like 20 of 'em.
Second, the Devils can't one-shot-kill you, they can only two-shot-kill you =P
Third, those of you complaining that getting stuck in barricades and turrents ect., well, thats your own damn faut, be strategic and careful when building a base =)
I got a(n) A- on hard! My score was 1107172 with a max combo of 144. I scored 193 perfects, 141 greats, and 21 goods. I got only 2 bads and misses! I was playing on 5 speed and had 0 crazy options on. =D
What I did was stay next to the mothership and upgraded was my guns to lvl 4, then I lvled my shields to lvl 2, then save up till you have lvl 4 guns, now, stay at your ship a tid bit longer until you can upgrade your allies to lvl 2, once you have done this head to the enemy ship, start killing the outer defenders until you can lvl up your shields to lvl 4, then sit right next to the Evil Sun and just kill the defenders, first lvl your allies to lvl 4, then get secondary guns, by this time there should be just two or three defenders left, kill them, then go for the Evil Sun. I hope this helps!!