eBay, Amazon Used, or local retro gaming shops.
Since the game's intellectual property is still technically owned by Ubisoft, these sites operate in a legal gray area. R.U.S.E. Full Game Download
Most physical PC copies of R.U.S.E. are Steamworks titles. This means even if you have the disc, you will likely need to register the code on Steam to install and play it. 3. Console Versions eBay, Amazon Used, or local retro gaming shops
The game is Backward Compatible on Xbox One and Xbox Series X|S. If you can find a physical Xbox 360 disc, you can pop it into a modern Xbox console, and it will download a digital version for you to play. 4. Abandonware & Unofficial Downloads are Steamworks titles
Because the game is no longer produced, supply is low and prices can be significantly higher than the original retail price. Always check the seller's reputation before buying. 2. Physical Retail Copies
Always use caution with unofficial installers, as they can be bundled with malware or require "cracks" that compromise your system security. Why was it removed?