minimal:
reqprocessor: Dual-core 2.2GHz
reqgraphics: OpenGL SM3.0 capable GPU with 1GB VRAM. Graphics card that has vendor-made drivers installed.
reqmemory: 2 GB RAM
reqdiskspace: 4 GB available space
reqsystem: Ubuntu 12.04 LTS (64-Bit)

recommended:
reqprocessor: Quad-core 2.7Ghz
reqgraphics: OpenGL SM3.0 capable GPU with 1.5GB VRAM. Graphics card that has vendor-made drivers installed.
reqmemory: 4 GB RAM
reqdiskspace: 4 GB available space
reqsystem: Ubuntu 12.04 LTS (64-Bit) or later