Ultra is the fastest Gamespeed at 500 turns Blitz is 1K turns, Normal is 2k turns. I cannot play on any GS slower/longer than the 4K one Epic?
I normally Test on Blitz or Normal. I have done an Ultra and need to Do another one again to get past industrial Era. Before more big changes occur. Otherwise i have to start over.

One would think retired and at 73 I would have lots of time to play! But my playtime is not even 1/3 of what it used to be, I have Way too many Home projects in the works! House turned 53 this year! New roof in 21 new Windows main floor 22 new Hot water heater & Natural gas furnace in 23! And I still need to remodel the living room and basement bathroom Plus finish the retaining wall near the basement outside door.
Garden is also in full swing now. Canning green beans & pickles atm. Started to dig up new potatoes too. 156 hills of Taters takes a bit to hand dig up! Then sort and store afterwards for winter.