Overview
- Estimated achievement difficulty: 4-6/10 (Depending on whether you have previously played this on PC/iPod).
- Offline: 12/12 (200/200)
- Online: 0/12 (0/200)
- Approximate amount of time to 20015-20 hours 
- Minimum number of playthroughs needed: A few as you'll need to go back to earn some cash to buy all the plants, the Tree of Wisdom and the food for the Tree of Wisdom. 
- Number of missable achievements: None
- Do cheat codes disable achievements?: No Cheats
- Does difficulty affect achievements?: No
- Glitchy achievements: None
- Unobtainable achievements: None
- Extra equipment needed?: Second controller.

 

Step 1: Adventure Mode:
Simply play through adventure mode. This will unlock "Home Land Security." This should take a few hours to complete. "Soil Your Plants" and "Crash of the Titan" will unlock during your playthrough aswell. Remember once you have unlocked the chomper to go for "Nom Nom Nom," and to also go for "Close Shave" once you have got all 5 lines of the lawn, as these are easily done once they first become available as there is no level select to choose the easier levels. You should also try to get "Explodonator" while you play through advneture mode.


Step 2: Versus Mode:
You will need another controller to complete "Versus vs Versus" and "ZFF's 4 Evr." This shouldnt take too long to complete

Step 3: Farming Cash:
You will now want to try and earn enough cash to grow the Tree of Wisdom and to buy all plants from Crazy Dave. You will need a total of $345500 to unlock all plants and buy the Tree of Wisdom, the tree food and all the 9 plants. The best way to farm cash is play the Last Stand mini game, however to unlock this mode you will need to complete 13 of the mini games. Follow this video for an easy way to make cash quickly: (is done on PC but the same principles apply)

 
 


This method should take you anywhere from 5-10hrs to get enough cash to buy everything. However while playing you will get alot of plants for your zen garden. If you check on the plants there and sell them once they reach $8000 (or $3000 if they are pool plants/mushrooms) It will take you between 3-5 hours to get enough cash to buy all the plants and tree food.

Alternatively you can grind plants for your Zen Garden. Once you have a full set of 32 plants, you can disconnect your console from Xbox LIVE and change the date to the next day, so you don't have to wait until you can water/seed your plants again. 
After changing the date 3-4 times, I've reached the final stage. Now you could farm coins, which are dropped by the plants or you could just sell all of them in order to gain about 240,000 bucks. 

Step 4: Survival Mode:
This will take the longest to do. You will first need to unlock Endless Survival, which is done by completing all the other survival challenges. Once these are done you will then need then reach flag 40 of Endless Survival. 
https://hubpages.com/hub/Plants-Vs-Zo...ags-and-Beyond shows some good was of getting upto wave 40 and beyond.

Conclusion:
You should now have all the achievements for PvZ. However there are still loads more to do in this game, such as challenges, zen garden, minigames, find the Zombie Yeti etc.

 

[x360a would like to thank MopFlop for this Roadmap]

Plants vs. Zombies Achievement Guide

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Show completed achievements
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There are 12 achievements with a total of 200 points

  • Complete adventure mode

    This is done by playing through the adventure mode. There are 5 zones each with 10 parts; 

    1. Is in the garden during the day
    2. Is in the garden during the night
    3. Is in the pool area during the day
    4. Is in the pool area during the night and fog
    5. Is on the roof, with wave 10 being against the boss

    These are all pretty straight forward to complete. Just choose the plants depending on what zombies are appearing and then you should have no problem in completing this mode. It can be done with 2 players playing through adventure mode.

  • Collect all 49 plants in the game

    For this you will need to have all 49 plant. 40 are unlocked through the adventure mode while the other 9 are bought from Crazy Daves Shop. The Imitater counts as a plant. These 9 plants will cost you $98000.

  • Grow the Tree of Wisdom to at least 100 feet

    You will have to grow the tree of wisdom to 100 feet. Once you have completed adventure mode, the tree of wisdom is bought from crazy dave for $10,000. where it will then be located in the Zen Garden. You will then need to feed it tree of wisdom food. Each packet you feed it will raise its height by 1ft. Therefore you will need to purchase 100 packets. You start of with 5 so you will need to have $237,500 to purchase 95 more packets.

  • Defeat your first Gargantuar

    Will unlock this while you play through adventure mode. You will first encounter a Gargantuar on the Roof levels. If you are struggling to defeat a Gargantuar then try and have the chilli and cherry bomb as you will need to hit it twice to kill it.

  • Bowl a winner with a friend in Co-Op Wall-Nut Bowling

    Once you complete adventure mode you will need to go play the Wall-Nut bowling mini game. After you complete this in the coop mode Wall-Nut bowling will become available. Just play through it with a friend or have the 2nd controller as a back up to store Wall-Nuts so you can switch over when you run out. Remember to bowl the Wall-Nut which kills the last zombie.

  • Survive 40 waves of pure zombie ferocity

    This will take the most time to complete. You will first need to unlock Survival Endless which is done by doing all the other survival challenges first. Once you do this you will need to last till wave 40.
    The video below shows someone getting to flag 76+ Just watch it carefully and follow the same principles and it hopefully should take too long to complete.

    YouTube - Plants vs Zombies Survival Endless Flag 76 and Beyond

    Just to note you need to die once you have 40+ flags for the achievement to unlock.
    Also If you dont want to use cob cannons, for whatever reason, you can try this setup. Just remember to use Spikerock for all the zombonis. Thanks to Brambledamble for this setup.

  • Plant your first 10 peashooters

    Should appear in the first few levels while you play through adventure mode.

  • Go on a 5 game winning streak in VS. mode

    Load up Versus mode with a 2nd controller. Then pause the game with the 2nd controller and click Concede Match. Repeat 5 times in a row. You must click Play again, when the game is finished, otherwise it will reset back to 0.

  • Blast 10 zombies at once with a Cherry Bomb!

    I found that the easiest way to do this was to have Cherry Bombs attached and wait till a huge wave of zombies appeared. Then place this is the middle of a large group, Hopefully ten zombies will be in this. If not just try again. Shouldnt take too long to do. 
    If you havent managed to get this in your playthrough of Adventure mode you can do it in versus mode. Make sure you have enough cash for a cherry bomb, and the person who is controlling the zombies has enough to call in 10 zombies. Then call in 10 zombies an plant the cherry in the middle.

  • Win any level after all 5 lawnmowers have been used

    As soon as you have 5 parts of the lawn in adventure mode, (i think its the 3rd wave) let the first zombie on each row walk to the end and activate the lawn mower. Once a lawnmower has been destroyed you should then start to build on that row to protect it. Dont worry about your plants being destoryed as the lawmower doesnt affect them.
    Or

  • Go trunk diving and spend at least $25,000 on Crazy Dave's Twiddydinkies

    Will be obtained by the time you purchase all plants.

  • Stop the horde using only the Sunflower, Wallnut, and Chomper on any level

    Easiest to do when you first unlock the Chomper while playing through the story mode. Just build sunflowers on the back two rows then have chompers in the two rows in front with a Wall-Nut in front of them. 
    If your chomper is taking to long to eat the zombie then you can dig it up and build another one where it was to restore it back to its original state ready to eat more zombies.
    Heres a Video guide to show you how to do it:

    If you missed out on doing this when you first unlocked the chomper you can also do this easily on level 1-1 of your 2nd playthrough of Adventure mode or on Survival Day.

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