Since the file is a .rar archive, follow these steps to access the game files:
: You may need a community-made "blurry texture fix" to bypass the game's inability to recognize modern high-RAM systems.
: When defending, use cheap, high-defense units like bunkers to protect major objectives. Defenders often have a range and air advantage.
For further troubleshooting or configuration details, you can refer to the Shattered Union PCGamingWiki . Shattered Union Gameplay Guide - Steam Community
The PC version of Shattered Union often encounters issues on newer hardware, such as blurry textures or crashes due to RAM limitations.