minimal:
reqprocessor: Intel Core 2 Duo, 3.0GHz or AMD Athlon 64 X2 6400+, 3.2GHz
reqgraphics: nVIDIA GeForce GTX 260, 512 MB or ATI Radeon HD 5670, 512 MB (Does not support Intel Integrated Graphics Cards)
reqmemory: 4 GB RAM
reqdiskspace: 4 GB available space
reqsystem: Ubuntu 12.04 (64-bit)
reqother: directx: Version 9.0c

recommended:
reqprocessor: Intel Core i5-3470, 3.20GHz or AMD FX-6300, 3.5Ghz
reqgraphics: nVIDIA GeForce GTX 660, 2 GB or AMD Radeon HD 7870, 2 GB (Does not support Intel Integrated Graphics Cards)
reqmemory: 6 GB RAM
reqdiskspace: 4 GB available space
reqsystem: Ubuntu 14.10 (64-bit)