This is a used copy of the Japanese version of Microsoft Combat Flight Simulator 1. I previously purchased it as "damaged box." There are no issues with the CD. I have confirmed that free flight and quick combat are playable on Windows 11 25H2 using an XBOX 360 controller. To play, please install the software and complete the authentication. Then, overwrite the patched files from the included DVD-R. Instructions for settings that need to be done before starting the game are also included on the DVD-R. The N*_C* patch has also been applied, so this is all you need to do to prepare. The operating environment I tested on was an 8th generation Core i5, 8GB of memory, a 250GB SSD, an integrated GPU without a graphics card, a Full HD laptop, and a desktop with an RTX 3080. On the laptop, I was able to enable hardware acceleration in the game settings, but I couldn't on the desktop. I didn't feel that the game was slow during flight on either machine. However, please understand that I cannot guarantee that it will work on your Windows environment. As mentioned above, this is a used item, and the box is in pieces and has stains. If you are looking for a beautiful, complete product, please refrain from purchasing. I cannot accept price negotiations. Immediate purchase is welcome. #Microsoft #CombatFlightSimulator #Combat Flight Simulator #CombatFlightSimulator