The requirement for the September 2015 24-Hour Contest is “Ice Age”:
https://boardgamegeek.com/thread/1428251/24-hour-contest-september-2015
Tips & Resources for Board Game Designers
The requirement for the September 2015 24-Hour Contest is “Ice Age”:
https://boardgamegeek.com/thread/1428251/24-hour-contest-september-2015