Well first off u have to have good weapons and pick the right Equipment and the right Ability. K ill put it down in Number form.
1.Weapons Since you are playing Alien campaign always use alien weapons they do more damage then human ones
1.Starter=Plasma Pistol. 2.Side Arm=Burst Torch (Mainly cause of the Accuracy and the Range) or Magnum (Very powerful) 3.Close Range=Zapper (good Alien weapon) or Shotgun (My personal Fav) 4.Automatic=Precision Laser (Best on for alien Campaign) 5.Long Range=Holy Grail (Mainly because it is so powerful and kills the Raze soldier in 2 hits) 6.Heavy=Laser Minigun (Mainly cause it fire very fast) or Destroyer (Very Powerful) 7.Explosive=Rocket Launcher (its always the best!)
2.Abilities K now that we have gone threw the Weapons we can now go threw the Abilities.
I mainly like to choose Katana Static Field Grenade or Teleport! (if u can buy it) these ones helped me a lot! And its mainly personal preference, if u are better with katana then Static Field use Katana.
3.Equipment K now Equipment, now u always gotta check with your weapons what is the things that other weapons have that they don't E.g Longer range, Accuracy etc. with those weapons that i wrote Above they will work fine so u don't need any equipment that will have more damage or longer range etc, these are the ones i will choose.
1. Defensive= Combat Armour (+50 Max Health) 2. Utility Equipment= Pickup Booster (good for when low on health) 3. Offensive= Extra Clips (Good for weapons like Holy Grail u will have more Ammo!)
Well thats all the things that u need and remember always RUSH the Raze Soldier Cause u only have 3min, the other enemies are easy just focus on the Raze soldier.
K thats all! Oh Yeah remember Practise makes Perfect so if u keep on dying, just play quick matches set the difficulty to Insane and try to win in less then 3minutes! Also if this doesn't help let me know please respond!