As I mentioned on https://www.tt-forums.net/viewtopic.php?f=32&t=75058&p=1173476#p1173476
I created a scenario that improves the landscape of the original 2009 scenario by Myfineshrine.
I have adapted my Australia and Timor (V 1.1) into a scenario set in 1930, before any trains become available in the scenario, forcing players to use early models of ships and road vehicles. It also features a reduced number of settlements, particularly in the deserts because those areas are sparsely populated now and even more so back in 1930. I also add the ability to found new settlements, as some Australian settlements (particularly remote mining settlements) were founded decades after 1930.