I have recently sort of switched from playing TS4 for years to trying to get the hang of TS3, and I wondered if there actually exists a thread where someone gathers a list of challenges you can play i...
The thread linked above has a comprehensive list of challenges, but many if not most of the links are broken—they just redirect to the forum home page. I think that this is because the thread predates the forum reorganization from a few years ago. I found a more recent thread with what look like active links: