Alien Breed 2: Assault

This is one of the hardest trophies in this game. I recommend going for it one at a time. This way the 2nd person can utilise the small door trick and be the 'meat' sack' taking all the damage.

TIPS:
-You are allowed to take damage to Hardened Armor if you have it equipped.
-There are 3 pieces of Hardened Armor to pick up as well as the occasional one to buy from the Intex Terminals.
-You can use small doors to your advantage. The player who is not going for this trophy or the 'meat sack' person should stand in between small doors whenever possible. As long as the aliens are only coming from one side they will not be able to go through the door as long as you're there, even if you're dead. This is especially useful right at the end when you activate the elevator. There will be a 30 second countdown and a lot of attacking aliens. As long as you retreat to the small door near the Intex Terminal you will be fine.
-The 'Boney Shield' alien is a bit of a pain when it blocks your bullets. I suggest switching to the Shot Cannon when it is doing this as it breaks its shield.
-This video doesn't show it, but you can go for the 'Lazy' trophy at the same time. If you use the small door trick then you should have no trouble getting through the mission without taking any damage to your health or firing a shot. If your having trouble then try to get this trophy separately from 'Lazy' so both of you can shoot.

Thank you to Majos for finding the videos, and to todayisforgotten for making them.
Thank you to cloudman11224 for telling me about the small door trick.