This extension contains functions for easily operating robotic arms or snake/rope like shapes. Inverse Kinematics in short, is the process of calculating the joint positions in relation to each other, from a specified end point.

The extension comes with 27 well-optimised scripts and a thorough documentation accessible both inside GameMaker, and outside GameMaker in a google docs document. This extension does not support arms with multiple branches.

Undocumented behavior or issues in the documentation, can be forwarded to


More info

End User Licence Agreement (EULA).

Version 1.0.0. Published November 19, 2017

Created with GameMaker: Studio v1.4.1772

Age Rating: 4+

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Alexander Y 23 February 2019

It's great.

So simple to implement with the scripts and documentation included. I can come up with a billion different things to use it for.


Anonymous 19 September 2018


Anonymous 28 April 2018


Jeremiah s 26 November 2017


Great documentation. This IK system is extremely versatile and has enough documentation for anyone to be able to understand what all the functions do. It is easily adapted to any situation in which you might need to use IK. Thank you for this TonyStr.


Thiago D 26 November 2017


I would recommend putting the Example tutorial on the marketplace, so it's easier for people to find it.


TonyStr (Publisher) 21 December 2017

Thank you for your review! Somehow that has not crossed my mind yet, but I'll definitely do that (along with a few hotfixes) as soon as I have time!

EDIT: now available at


Tyler G 06 January 2018


Lots of features and very easy to use. The documentation is good too.

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