"Game Over, Man!" tips

[IrishNexus]

For anyone who has managed to get "Game Over, Man!" in the Havoc DLC, what is essentially the Easter egg trophy, was wondering if anyone could suggest some tips.

 

Had a few attempts at the trophy last night with two friends, final run ended up being just over an hour long in which we were able to get the four cards but were only able to upgrade our cards to roughly level 15 each before everyone was swarmed with zombies and we failed. Of course, after having been going at this trophy for about five hours constant, we called it a night.

 

Decker's card is extremely easy to get as we go for it immediately once we have access to the two rubbish chutes, at the end of each round after leaving a few zombies running about to give us time. Kahn's is generally okay but we've had a few times when the four buttons are pressed and the little slot just doesn't open to reveal the card, and then we've never encountered any more infected zombies after that round. Oz's can be a tad annoying when trying to get the timing down, but generally is okay. It's Lillith's who is the absolute killer.

 

The 3D printer seems to have no rhyme nor rhythm to it, so trying to get that one damn laser weapon is extremely aggravating. We must've used the printer about forty times on average to get the gun, even when we believe our reflexes are great when it appears. This is extremely frustrating because it means you end up getting all four cards at a really late round, have wasted a ton of credits, and have to upgrade your cards on these very frantic rounds where getting downed is very easy.

 

Just want to know if anyone has any tips to get Lillith's card, or more specifically that laser weapon, easily, and then if anyone knows just general tips for surviving to late rounds. We use the Exo testing room along with the initial outside area, but when tons of zombies swarm those areas along with the electric ones who short out your Exo, it gets very overwhelming.

 

Cheers for the help, really want to get this trophy out of the way.