Infestation mode is comparable to a horde/zombies mode. I did the trophies with my friend and it helped make the time go a lot better. I highly recommend finding someone who can share the torture of this boring mode. There aren't many trophies tied up into this mode and none of them are actually difficult. I would say that a couple are time consuming (and by that it probably will only take a couple hours to do the trophies). The 4-player achievement is your worst enemy here. The servers are pretty much dead. You may find one random loitering around but don't count on finding 3 other people. You'll definitely have to do a session for that.
You are able to unlock trophies that are tied to killing enemies in a certain way and gathering salvage and upgrades.
Select Infestation mode from the Start Screen and you are given some options as to your character and emblem. You do NOT have to worry about which character you are or anything like that. Just select a map and you will be starting on Wave 1. Power yourself through the first 10 Waves (the first 9 waves are very simple) and you will earn:
Wave 10 can be a pain in the arse. But you will be handsomely rewarded because Wave 11-14 are very easy waves. It's almost too good to be true right? I am guessing how they set up Armageddon's Infestation mode is Waves 1-8 are fairly easy. Waves 9-10 are a little more difficult. Then it cycles itself and Waves 11-18 are easier than Wave 10. But now Waves 19-20 will be your hardest waves yet. If you find yourself completing Wave 20, you should pop this:
Only 1/3 more to go! Waves 21-28 are again fairly easy. There will be more enemies on these waves but they aren't overly difficult. Wave 29-30 should go well for you at this point. You will have "unlocked" all the good weapons by now and even though these last 2 waves are technically the most difficult, you should survive without problems. At the end of Wave 30, you pop:
You will need at least one friendy to do this next trophy. But it's fairly easy. Just select Wave 26 or so on the map you completed. Invite your boosting buddy and make sure the difficulty is set on hard or insane. Either let the bugs knock you down or kill yourself with the rocket launcher and start the reviving. Take note though, you can only get knocked down so many times in a round. If you go past what the game allows you (it shows how many lives you have on the screen) then you die and cannot finish the round. So always make sure you have one life left and finish the wave. Rinse and repeat until you and your friend have 25 revives and this trophy is yours:
The 4 player trophy is actually incredibly simple. Load up a map and while it does not matter which map it is, make darn sure that the level you start on is 11. To make life easier for everyone, set the difficulty to easy. All you have to do is gather 3 other people and make sure that everyone survives this one single wave and this trophy is yours:
The most annoying Infestation trophy requires you to finish one wave on each map. In order to do this however, you must complete at least 5 waves on each of the "day" maps. Once this is done, you will have unlocked the "night" versions of each map. Then all you have to do is complete 1 wave on each of the "night" maps. Infestation contains 8 maps and then when you add the night maps in, it brings the total to 16. This requires a minimum of 48 waves to play through (40 waves for day maps, 8 waves for night maps). Once this shotgun-in-the-mouth torture is done, you will earn:
And Infestation mode is done! There is no true multiplayer so be thankful we've been spoiled this whole time!
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