Minimum: OS: Windows® 7 (32/64-bit)/Vista/XP/8.1 Processor: AMD Athlon 2.4 GHz or Intel® Pentium® 4 Processor 2.80 GHz Memory: 1 GB RAM Graphics: DirectX® 8.1 level Graphics Card (Requires support for SSE) DirectX: Version 8.1 Network: Broadband Internet connection Hard Drive: 7 GB available space Additional Notes: Download size with Half-Life 2 installed: 3.5GB