Experimental Mapping Challenges

Weird, strange and definitely freaky!

Experimental Mapping Challenges are a chance for mappers to experiment with unusual themes and concepts.

The challenges last either 50 or 72 hours, depending on the theme and date.

The challenges are not part of an official series and there are no official prizes.

The Dates

Experimental Mapping Challenges are spread throughout the year. In order to keep events effectively and clearly organised, I have created a central CALENDAR of events. Please use this to check the dates of the events you are interested in.

The Judging

I am the only official judge, but only in the sense that I will select my favourite entry. There will also a community vote via a poll on the released mod's page.

If you would like to donate some cash for these or other events, please visit my PayPal Donation Page.

Custom Content Note

Custom content can be included in an entry but it must be used with prior, written persmmision, which must be included in the entry readme.txt file.

In addition, any custom content must be able to be used in monetised playthrough videos posted on the internet.

Challenge Theme Announcements

At 11am GMT on the start of the challenge, a post is made on the site describing the theme in detail, giving some examples of use and listing all the rules and requirements.

A live countdown timer is also visible.

Entrants can ask questions via the comments system of the site, direct emails to me if they want to ask private questions and finally questions can be posted on the official RTSL Mapping Challenges channel on the Source Modding Community Discord server.


The Experimental Mapping Challenges started in May 2017. I decided to try a weekend mapping challenge and called it the 50-Hour Mapping Challenge.

Its theme was minimilism and it produced some cool maps.

It seems that mappers enjoyed the simple themes and reduced times and I have run a few more since.

2018 sees the possibility of a lot more of these types of challenges.

You can view all the previous experiemntal mapping challenges HERE. In the "instant filter" type EMC.

Questions, feedback, suggestions, comments.

If you have any questions, feeedback, suggestions or comments regarding the Experimental Mapping Challenges or ANYTHING related to the site, please don't hesitate to contact me: [email protected].

Help me create more and better content - please support me on Patreon

Help me create more and better content - please support me on Patreon