No Fungus Among Us

Difficulty: Hard-very hard (Extremely easy in I, Zombie)

No Fungus Among Us is an achievement that can be obtained on the Steam, iOS, PC, PS Vita, Nook, and Android versions of Plants vs. Zombies. It is worth ten points on the Game Center. It requires the player to complete a Night level without using any mushrooms. There is a glitch on the PC and Steam versions where it can be completed in I, Zombie.



Strategies
Strategy 1: Play Level 4-10 without using the Magnet-shroom and the Sea-shroom. Just pick whatever plants you want as long as there are no mushrooms.

Strategy 2: Begin the level by picking the Sunflower, Cabbage-pult, Kernel-pult, Potato Mine, and Wall-nut. Now, you should pack any instant-kill plants you prefer to use. Purchase the rake as well. This should be done on Level 2-1, and the guide is assuming it is. If you followed the procedure, getting this achievement will be simple. When the level starts, plant a Sunflower in the same row as the rake. Proceed to do so once more. At this point, do nothing but plant Sunflowers until you have at least five, keeping them out of harm's way. Remember, do not plant them past the second row. Take full advantage of the lawn mowers and ignore zombies until you have enough Sunflowers to retaliate. Now, you may plant a Potato Mine in front of a proceeding zombie to further delay them. When you have a fair amount of Sunflowers, begin to plant Cabbage-pults and Wall-nuts to obstruct the incoming invaders. Do not waste your time using Kernel-pults yet. However, once you have every lane guarded by a Cabbage-pult, you may now plant Kernel-pults. At this point, things will play themselves out as if it were a daytime level.

This strategy can be used when you first play Level 2-1. However, you will end up losing at least one sunflower, as you will not have the rake or any other plants after Level 2-1. The strategy is exactly the same, replacing all catapult plants with peashooters.

Trivia

 * The achievement's name is based off the term "A fungus among us."
 * It is also a reference to the album "Fungus Amongus" by the band, Incubus.
 * It is the opposite of the achievement Good Morning.
 * No Fungus Among Us and Photosensitive are the only achievements that require the player to beat a Night level. However, Photosensitive requires the player to pick up absolutely no sun instead of not using mushrooms.
 * It is possible to get this achievement through quick-play mode on the iOS or Android versions.
 * Playing an I, Zombie level without mushrooms such as the first level also counts for the easiest way to get this achievement, even on Game of the Year PC.
 * Playing the first I, Zombie level on the iPhone or iPod versions of Plants vs. Zombies does not unlock this achievement. Completing a Fog level without using mushrooms also does not unlock this achievement.
 * Doing the mini-game Whack a Zombie will also not earn the player this achievement, even if the player does not use Ice-shroom in the Mini-game.