This was my first time playing Civ 5 on steam. I open up the mods section to play a single campaign and I see this.
I was surprised and confused, but I was also intrigued so I thought, why not!
I also decide to use the Inverted Earth's Map Script because I was always interested in it (although it took me forever to figure out that I could use tiny map for some strange reason; I'm not a noob, show mercy!)
I launch my game and I'm relatively isolated. I start of near present day Chile. There's a city state above me where the Gulf of Mexico would be as well as another city state southwest of Mexico. I quickly settle my second city and grab all the lands surrounding the city state. "I'm going to rule this terrain"
After scouting for a bit I realize that there wouldn't be many places to settle since I'm blocked off by 4 city-states in total as well as a mountain range to my west. I decide to go for a tall culture victory. I settle my 3rd and final city near present-day Guyana, Suriname, and Guiana (east of Venezuela). My pink borders eventually expanded due to my gargantuan culture to the point where my borders crossed the mountain ranges, where I was finally able to meet my first civilization, Catherine the Great of Russia.