According to the official Steam page and PCGamingWiki , the game is lightweight and runs on older hardware: Imperial Glory - Download
: Offers a DRM-free version that requires no activation or internet connection to play. Steam : Available for purchase and often goes on sale. Imperial Glory Free Game Download Full Version
The full version of is not officially available as a free legal download . While you can find a free trial/demo version on some sites, the complete game is a paid title. Where to Buy Imperial Glory According to the official Steam page and PCGamingWiki
: Great Britain, France, Austria, Russia, and Prussia. Imperial Glory Free Game Download Full Version
: Includes 3D land and naval battles, diplomacy, and historical research across different eras. System Requirements (Minimum)