GameMaker (2.0 - 2.2.x)



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Fingerprint GML

A simple script for fingerprinting a user in Game Maker Studio. My use case is to fuzzily identify different devices / users coming from the same IP address when they connect to my server.

Inspired by

How it works

The fingerprint is calculated by writing the following to a buffer and retrieving an MD5 hash.

  • Operating System
  • Browser
  • Display Width / Height
  • Are Shaders Supported?
  • Timezone
  • Gamepad Count (+ count of connected gamepads)

On Windows-only, the following environment variables are used:

  • Username
  • Computer Name
  • Number of Processors
  • CPU Architecture, identifier, level and revision

Quick start

  • Import the fingerprint_md5.gml script into your project.
  • Call "fingerprint_md5()" to get a fingerprint of the user.


  • Game Maker Studio 2 (Untested in GMS1)


If you have ideas on how to improve the fingerprinting, either with a better hash function or by utilizing more feature detection functions in Game Maker Studio, please post an issue or submit a pull request on Github:

Alternatively, you can post on the forum topic here:

Ideally this script would have better fingerprinting by being able to utilize RAM information, GPU information and CPU information such as core count / GHZ / cache sizes. Unfortunately, I haven't found any such scripts / functions in the Game Maker Studio 2 documentation.

End User Licence Agreement (EULA).

Age Rating: None


GMS2 - Version 1.1.0. Published March 12, 2018

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