Challenge Game Info File
A Challenge Game Info file adds a description and other detail to your challenge game.
It is optional. A challenge game works perfectly well without one.
Creating one
It is a plain text file with a .TXT extension — Windows Notepad is enough. Put it in the same folder as the Challenge Game file, which you can open with the [Open Folder] button.
The filename is what links them. Capitalism Lab looks for a TXT file with the same name as the Challenge Game file, and shows what it contains on screen.
A challenge game with an info file added:

The file format
[CHALLENGE GAME]
Title=<1 to 35 characters>
This overrides the title you entered on the New Game Settings menu — so if the two differ, the info file wins.
Description=<1 to 500 characters>
Player Skill Level=<Novice, Experienced, Advanced, Expert>
Contest Started On=<YYYY-MM-DD>
Contest Deadline=<YYYY-MM-DD>