Survival Mode

In Survival Mode, which is unlocked when Adventure Mode is beaten for the first time, the player must survive multiple waves of zombies. He/she gets to choose new seed packets to defend against a different group of zombies, five in total, every 1 or 2 flags (depending on whether playing the normal or hard versions) to continue building up his/her defenses. For each group of zombies, the plants the player previously had on the lawn and your sun remain, but Lawn Mowers, Pool Cleaners, and Roof Cleaners are not renewed. At the end of the first completion of each Survival Mode level, a Trophy is received with a diamond, and gold coins for any remaining Lawn Mower, Pool Cleaner or Roof Cleaner. Survival Mode does not appear in iPod or iPhone Version. The Survival Mode appears in PC, Mac, PS3, Xbox Live Arcade, DS, and iPad version. The Normal modes is 5 flags, Hard modes is 10, and the Survival: Endless is as many flags as you can survive.

Normal Modes - Day until Roof
In each of these modes the player must survive 5 flags of zombies, with a new group after each one. The zombie concentration is the same as in Adventure Mode levels, so these levels should be pretty easy. Zombies from other areas may show up in some cases, such as Screen Door Zombies in Survival: Day.





Hard Modes: Day (Hard) through Roof (Hard)
These levels, as the name states, are quite hard. This time, you must survive 10 flags, with the zombies changing every two flags. To win this, plants like the Twin Sunflower, Winter Melon, and Tall-nut are essential. As the groups are different every time you play a level, it is not possible to create a strategy based on exactly what was encountered. You will probably want to have your Sunflowers inside Pumpkins in the back with a row of Split Peas, Spikerocks, or a pair of Gloom-shrooms (one on the second row from the bottom, and one on the second row from the top) if Digger Zombies come, or a row of Cacti if there are Balloon Zombies, although Cattails work much better for this purpose in Survival: Fog and Survival: Fog (Hard). Even when you don't have any Balloon Zombies, you would quickly find out that Cattails are one of the best plants, and in both pool and fog levels, turn on to a must-have plant.

Blovers can also work, but you have to pay extreme attention. Survival: Day (Hard) and Survival: Pool (Hard) should be the easiest, with Survival: Night (Hard) slightly more difficult, Survival: Roof (Hard) still harder, and the hardest being Survival: Fog (Hard), though this is subjective. Cob Cannons come in handy on these levels, as there will probably be Gargantuars at some point (usually after flags 5 and 6), but they aren't necessary; instant kills such as Cherry Bombs, Jalapenos, and Squash should be sufficient. However, they make Survival: Roof (Hard) much less strenuous, and are very useful on Survival: Fog (Hard).

The Survival: (Hard) levels also introduce a new Trash Can Zombie in the Xbox Live Arcade, PS3, and DS versions. It is basically the equivalent of a Screen Door Zombie exept slower.

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Survival:Endless
This time, the player attempts to survive as many waves of zombies as he/she can, choosing new seeds every two flags. At first, the zombie density is the same as in the Hard modes, but it quickly grows to over that of Column Like You See 'Em. In addition, upgrades for plants get progressively more expensive; for every upgrade plant that is on the screen, additional upgrade plants cost 50 more sun. Winter Melons, and Pumpkins are essential here, and both Cob Cannon and Gloom-shrooms are a must in almost all builds. Instants are very good here, although not completely necessary with the Cob Cannons, and zombies come in such droves that playing a half-hour of this will earn you maybe 20 or 30 thousand dollars if you only click half or a third of the coins, given that you are at least 15 waves in. The high number of zombies also has the effect of generating many diamonds in a short time; at its best a diamond may appear every 4-5 seconds.

One good idea is to use Cabbage-pults instead of Peashooters when starting out in order to better defend against Screen Door Zombies and Ladder Zombies.

Alternatively, (depending on preference) you could use Potato Mines and Imitater Potato Mines combined with Cattails to hold the zombies back while you save up to go straight to Winter Melons, Cob Cannons or other powerful plants.





This mode also introduces the Giga-Gargantuar, a red-eyed version of the normal Gargantuar that takes 4 instants' worth of damage before finally going down which means 100% more health compared to a Gargantuar.
 * Note: There can be more than one Survival: Endless - by playing a Survival: Hard game and modifying the save file name, it is possible to create Survival Day: Endless, Survival Night: Endless and others. This article only discusses the original. (In addition, Survival: Pool (Endless) and Survival: Fog (Endless) are the only ones with a working long-term strategy due to the lack of water for protection in the other levels.) However, these are only seen in the online version.

For a more in-depth Survival: Endless guide, click here.

Online Version
In the online version, the player can only choose 4 plants and meets the Imitater Football Zombie (also known as the Giga-Football Zombie).



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Modes

 * Survival: Daythumb|right|400px|How to get Roof Night Endless
 * Survival: Night
 * Survival: Pool
 * Survival: Fog
 * Survival: Roof
 * Survival: Day (Hard)
 * Survival: Night (Hard)
 * Survival: Pool (Hard)
 * Survival: Fog (Hard)
 * Survival: Roof (Hard)
 * Survival: Endless

NOTE: You can possibly play Roof Night only if you modified Saved data.

​Limbo Page Modes (Endless)
Limbo page is a hidden page which they never published a visible link to.

There is an instruction which set their visible flag to false and NOPed it out. it is currently best to use Cheat Engine

In the old versions of Plants Vs. Zombies, the following changes should be made. In the latest version of Plants Vs. Zombies (Game of the year edition), the following changes should be made. See the video tutorial.
 * 0x42DF5D = 0x90 = 144;
 * 0x42DF5E = 0x90 = 144;
 * 0x42DF5F = 0x90 = 144;
 * 0x430C80 = 0x90 = 144;
 * 0x430C81 = 0x90 = 144;
 * 0x430C82 = 0x90 = 144;

Trivia

 * In Survival: Endless in Plants vs. Zombies DS, there's a mistake where it says Survival: Day (Endless), although it should say Survival: Pool (Endless).
 * Sometimes in Survival: Fog/Roof, a Trash Can Zombie might appear.
 * Survival: Endless and Zombiquarium are the only instances that 15 sun are given only in a level.
 * Technically, this can occur with any level, because a combination Sun-shrooms, before fully grown, along with buying plants that cost 25 sun, can give sun in any multiple of 5.
 * Also, this is incorrect because max sun can be achieved in any level, not just Survival: Endless, though Survival: Endless is one of the easier ways to get it.
 * It is possible to complete all Survival Hard Modes by using only Sunflower/Twin Sunflower/Sun-shroom, Instants, Lily Pad and Flower Pots only.
 * The Normal levels are easy, but the Hard levels are hard, and the Survival: Endless is very hard.
 * All of the Survival: Endless modes, including Day, Night, Fog, and Roof are actually endless; the maximum flag record value one can have is 214,748,366 flags (equals 2^32 / 20). It is unknown what would happen if one were to exceed this record, but it might be similar to what happens when one exceeds the maximum foot value in the Tree of Wisdom.
 * The survival mode can be checked by editing the saved file using HexEditor. The value of flag number is set from 0 → 214748366, and then -214748363 → 0. In 214748366 flags, you will see all the zombies disappear in the last half of total number (107374183) (click here for ref.)