If you haven't already, I created an Achievement Guide for this game, and you should go & check it out!

https://steamproxy.com/sharedfiles/filedetails/?id=2097812134

To receive the Endless Chainsaw, you are required to do the following:

• Defeat Adam The Clown (Wonderland Plaza)
  
• Obtain the Book Criminal Biography (Wonderland Plaza, Sir Book-a-lot)
  
• Obtain the Book Entertainment (Paradise Plaza, Bachmans Bookporium)
  
• Obtain the Book Engineering (Paradise Plaza, Bachmans Bookporium)

When you have all four items, the Chainsaw will last for it seems, forever


If you have 3 Small Chainsaws in your inventory, it should last the entire story mode

At the start of the game, head over to Bachman's Bookporium


Grab the Entertainment & Engineering books

Engineering book increases the durability of most weapons found in hardware stores by 300%, making them last three times as long as before.

Additionally, the Entertainment book increases the durability of entertainment themed items by another 300%

Secondly, in Wonderland Plaza Sir book-a-lot, second floor, has the book Criminal Biography - This book increases the durability of all bladed weapons, allowing them to last three times longer than usual.


Adam the clown appears in front of the Space Ride Machine, during the scoop Out of Control. If it is your first play through of the game, Adam can seem challenging. Thankfully, there are lots of informative methods online (I.e Youtube) that demonstrate how to end Adam quick!

Attached below, if an example of a method to kill Adam easily (with preparations)


Once you have obtained all three books and the Small Chainsaw - combined - is the equivalent of Thanos with the infinite stones!

Happy Gaming!