How to play custom maps?

[Sir poezer]

I wanted to try a few series such as '12 angry test' but I have no idea how to play that series only, i mean I can play random maps and chambers, but that makes me jump from part 2 to part 6 back to part 4 and I want to follow the story line in it. so can someone help me with this?

[miet]

Each one of those 12 angry- maps have sub-button called "Collection" on the same page where you can subscribe to that map.
Click the "Collection..." button which will take you to another page. On that page when you scroll down you'll see "+ Subscribe to all" button, click it and you will have all the 12 maps from 1-12.