Serious Sam 3: BFE

Windows Minimum Requirements:

• OS: Windows XP 32-bit (with service pack 2 or 3)
• Processor: Dual-core from Intel or AMD at 2.0 GHz
• Memory: 1GB
• Graphics: nVidia GeForce 7800/7900/8600 series, ATI/AMD Radeon HD2600/3600 or 1800/X1900 series
• DirectX®: 9.0c
• Hard Drive: 4GB free hard drive space
• Sound: DirectX9.0c Compatible Sound Card

Windows Recommended Requirements:

• OS: Windows 7 64-bit
• Processor: Quad-core from Intel (i5/i7-series) or AMD (Phenom II) at 3.0 GHz
• Memory: 4GB
• Graphics: nVidia GeForce 480/580 GTX, ATI/AMD Radeon HD 5870/6970
• DirectX®: 9.0c
• Hard Drive: 4GB free hard drive space
• Sound: DirectX9.0c Compatible Sound Card

Mac Minimum Requirements:

• OS: OS X version Leopard 10.5.8, Snow Leopard 10.6.3, or later.
• Processor: Intel Core 2 Duo 2.0 GHz
• Memory: 2 GB
• Hard Disk Space: 6 GB
• Video Card: nVidia GeForce GT 120/9600M/320M, or ATI (AMD) Radeon HD 4670. Intel integrated GPUs are not supported.

Mac Recommended Requirements:

• Processor: Intel i3/i5 Quad Code 2.7+ GHz
• Memory: 4 GB
• Hard Disk Space: 6 GB
• Video Card: nVidia GeForce 8800/9800/260, or ATI (AMD) Radeon HD 4870

Linux Minimum Requirements:

• OS: Linux Ubuntu 12.04
• Processor: Dual-core from Intel or AMD at 2.8 GHz
• Memory: 2GB
• Graphics: nVidia GeForce 8600/9600GT, ATI/AMD Radeon HD2600/3600 (Graphic drivers: nVidia 310, AMD 12.11)
• OpenGL: 2.1
• Hard Drive: 4GB free hard drive space
• Sound: OpenAL Compatible Sound Card

Linux Recommended Requirements:

• OS: Linux Ubuntu 12.04
• Processor: Quad-core from Intel (i5-series) or AMD (Phenom II) at 3.0 GHz
• Memory: 4GB
• Graphics: nVidia GeForce 280/460 GTX, ATI/AMD Radeon HD 4870/5770 (Graphic drivers: nVidia 310, AMD 12.11)
• OpenGL: 2.1
• Hard Drive: 4GB free hard drive space
• Sound: OpenAL Compatible Sound Card

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.