Clean save before the elevator with Cities prebuilt with cities starting at level 3, pre-conquered and mod factions.
Read the description for used mods.

Clean save before the elevator with Cities prebuilt with cities starting at level 3, pre-conquered and mod factions.
Read the description for used mods.

Clean save before the elevator with Cities prebuilt on the default Settings.

Clean save before the elevator with Cities prebuilt with cities starting at level 3 and pre-conquered.

Clean save before the elevator with only UFOP enabled.