For Total War: Rome 2 I've created all vegetation models (trees, shrubs&grass), ground textures and some environment settngs.
Those assets were used in various other TW games, for example Total War: Pharaoh in 2023.
I also created some battle tiles, with ground blendmaps and asset placement.
There were 5 different climates in TW:R2 and 4 seasonal variants for some of those climates.