Commandos 3: Destination Berlin

Windows MINIMUM: 

• OPERATING SYSTEM: Microsoft Windows 98SE/2000/XP (Admin rights required), Pentium III 700 Mhz (or Athlon(tm) equivalent)
• Windows 7 Service Pack 1 and above are unsupported at this time.
• GRAPHICS: 128 MB on Windows 98SE, 256 on Windows 2000/XP, 32 MB DirectX 9 compatible 3D Graphics card (nVidia GeForce or Ati
• Radeon Chipset), Windows 98SE/2000/XP-compatible sound card (100% DirectX 9-compatible)
• HARD DRIVE SPACE: 2 GB free disk space
• OTHER: mouse and keyboard.
• MULTIPLAYER REQUIREMENTS: Pentium® III 1.0 GHz (or Athlon(tm) equivalent), 256 MB, 64 MB GeForce or ATI Radeon equivalent,
• LAN, ADSL or Cable Modem
• Pentium® 4 2.0 GHz (or Athlon(tm) XP equivalent), 512 MB, 128 MB GeForce 4ti or ATI Radeon 9xxx equivalent

To activate the Steam key you've received, follow the instructions below;

1. First up, open the Steam client. (If you don't have it, simply click the "Install Steam" button here => Steam Store )
2. Sign in to your Steam account. (If you don't have one, click here to create a new one => Steam Account)
3. Click on the "ADD A GAME" button in the bottom corner of the client.
4. Then, select "Activate a product on Steam..."
5. Write down or copy-paste the activation key that you've received from %s in the window.
6. Your game is now visible in your library! Click on your "Library".
7. And finally, click on the game and select "Install" to start your download.