This is vanilla BtS with a lot of various changes I find necessary to play it, without addition of new content (civs, units etc).
Mainly, unit stacks are limited to 8 units per tile, and movement speed is doubled for most units (infantry now has movement 2 and cavalry has movement 4 as default. Greatly (3x-4x) increased speed of naval units). Cavalry now has 50% malus to attacking and defending cities, making infantry more relevant but keeping cavalry as best field combat units. Advanced machine units, like tanks, airplanes and modern ships now require specific building (industrial park or drydock) to be built along with additional logical strategic resource (mostly iron in addition to fuel), to make them strategic asset in addition to infantry&artillery basis of army.
Some changes were made to the tech tree, mostly by adding more prerequisite techs for later techs, thus making "over-specialisation" on particular tech line less possible, especially regarding unit availability timing (still, there's plenty of freedom in research).
Also, resource generation is almost fully overhauled, along with few changes to yields. Deserts are better now with some resources spawning on flood plains and oases made improvable. The mod includes the best realistic map script packed in - Totestra.
Finally, traits of many leaders were changed to make them more "historical" or better gameplay-wise. Some traits also were changed (major commerce bonus of the Financial trait now cannot be exploited from the start). AI focus of some leaders also was changed, particularly removed religion-focus, along with starting Mysticism, of Maya, Aztec and Inca, as they have no religion of their own and seeing Buddhist Montezuma again and again is annoyingly unrealistic in my opinion. As religions still are all the same, it is recommended to play with "Choose religions" game option, so you would likely see Christianity, Islam, Buddhism or Hinduism as first (and thus dominant) religions instead of usual Buddhism and Hinduism.
There are few other changes as well, including graphical ones: Middle Eastern and African city artstyles, that are greatly lacking in vanilla BtS, were added from Rhye's and Fall. Infantry now has 5 models per unit instead of 3, greatly improving immersive feeling of battles (no performance issues encountered). And colours of several civs were changed to more historically/culturally relevant ones.
Mainly, unit stacks are limited to 8 units per tile, and movement speed is doubled for most units (infantry now has movement 2 and cavalry has movement 4 as default. Greatly (3x-4x) increased speed of naval units). Cavalry now has 50% malus to attacking and defending cities, making infantry more relevant but keeping cavalry as best field combat units. Advanced machine units, like tanks, airplanes and modern ships now require specific building (industrial park or drydock) to be built along with additional logical strategic resource (mostly iron in addition to fuel), to make them strategic asset in addition to infantry&artillery basis of army.
Some changes were made to the tech tree, mostly by adding more prerequisite techs for later techs, thus making "over-specialisation" on particular tech line less possible, especially regarding unit availability timing (still, there's plenty of freedom in research).
Also, resource generation is almost fully overhauled, along with few changes to yields. Deserts are better now with some resources spawning on flood plains and oases made improvable. The mod includes the best realistic map script packed in - Totestra.
Finally, traits of many leaders were changed to make them more "historical" or better gameplay-wise. Some traits also were changed (major commerce bonus of the Financial trait now cannot be exploited from the start). AI focus of some leaders also was changed, particularly removed religion-focus, along with starting Mysticism, of Maya, Aztec and Inca, as they have no religion of their own and seeing Buddhist Montezuma again and again is annoyingly unrealistic in my opinion. As religions still are all the same, it is recommended to play with "Choose religions" game option, so you would likely see Christianity, Islam, Buddhism or Hinduism as first (and thus dominant) religions instead of usual Buddhism and Hinduism.
There are few other changes as well, including graphical ones: Middle Eastern and African city artstyles, that are greatly lacking in vanilla BtS, were added from Rhye's and Fall. Infantry now has 5 models per unit instead of 3, greatly improving immersive feeling of battles (no performance issues encountered). And colours of several civs were changed to more historically/culturally relevant ones.
