Unlike Age of Empires 2 DE (which shares many generic unit models), AoE3: DE is unique. Each of the 22 civilizations (including DLCs like the Mexicans and Italians) has distinct:
The base installation size for Age of Empires III: Definitive Edition on PC (Steam / Microsoft Store) is approximately . However, with all expansions, high-resolution texture packs, and accumulated patches, the total disk footprint can reach 55–65 GB or more. This makes it the largest game in the Age of Empires Definitive Edition collection by a significant margin—roughly 2x the size of AoE2:DE and 3x the size of AoE1:DE . age of empires 3 definitive edition size