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).