So, you have probably read all of those other guides which claim that they are showing "easy way" but in actuality they are showing the standard way of just shooting zombies for an hour.
You tried that but you either lost due to how long and tedious it was or simply gave up as your brain was going numb and you were turning into the zombie yourself.

Well fear not, I've got for you actual "easy way" which does not require anything more than just running around!

So first of all, like in every other game where there are multiple enemies spawning, Pixel Puzzles has cap on how many enemies can be present on the screen at the same time. This is usually done to avoid crashing your computer (or game engine) as making many calculations for pathing can be RAM consuming, which is good for us as we can use it for our advantage.

It turns out that after initial wave of 60 zombies spawned, no more zombies will be added into the game until the previous ones are dealt with. Because of this we can simply skip killing the zombies and just focus on running around.

Seems pretty obvious, you press buttons, you run in specific direction of the button press but what if I told you that you run faster on Diagonal axis than you are on Vertical/Horizontal axis?


Due to how distance calculations are done in games, in many cases running diagonally makes you slightly faster than running in straight directions, which we should also use to our advantage.

Zombies are very slow in this game, which makes it easy to abuse their pathing.

As you probably guessed, we will not be killing any zombies while trying to obtain these survival achievements.
Our main goal is to merge all of the 60 zombies into one Uber-Zombie, in the middle of the screen by running in circle around them. The only hard part is suviving initial barrage of zombies from different directions, but it is easy if you use the "run diagonally" strategy.


Below the video in case you need visual representation on how it should look.

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Stay strong and solve dem puzzles!