Photo credits

Ladder shows a photograph for each of its six entries. Almost all of them are freely licensed images from Wikimedia Commons, and the licences ask that the photographer be credited. Here they all are.

Country flags come from flagcdn.com and are public-domain national flags. If you own an image here and would rather it weren’t used, get in touch and it comes down.

Everything else

Country data, history events and the rest of what the games are built on are described on the About page.