Anyone else completed Extinction?
Its pretty easy to do with 4 people.
Each one has a different class and one should use boaters for fast hands, one use feral instincts, one deploys armor and one deploys ammo
All equip sentry guns.
Ammo person, armor person max that out first, other 2 max our sentry guns.
Put propane taks on first barrier hive while destroying the small hives. this hurts the barrier hive.
Use the fire trap and a hypo knife on a scorpion if you have it. No need to buy any other guns until after first barrier hive. You can only carry 6k of money, so if you are over 3k when the barrier hive is destroyed, go get the gun in the next paragraph fast, money is deployed when the barrier have is destroyed.
After the first barrier hive you should be running at level 4 for ammo, armor and able to place 4 sentry guns down. (assumes you win some challenges). There is a nice gun to the left just as you reach the bottom of the hill on a deck/porch. Get it.
Leave the hive in the center left of the map for last - easiest to defend. In this area set electric fences and sentry guns.
For the 2nd barrier hive, rhinos may come out, armor piercing ammo shot at the feet takes care of them.
Be prepared to slug it out on the 2nd hive (to me this is the hardest part)
After clearing go into town and clear hives in order. Put down all sentry guns- 8 in each place and each person do they role with ammo, boosters and armor
Do that and you'll clear them all.
Once you are at the point to arm the nuke, move or put down sentry guns all the way back to barrier hive 1 (4 from crater to barrier hive 2, 4 from barrier hive 1)
arm it - run like hell to barrier hive 2 area - once the alley way is clear (there will still be aliens around) - run like hell to barrier hive 1. one that pathway is clear run like hell to the helicopter.
Enjoy