In order for you to play White Night on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 12.04
Processor (CPU):
Intel Core 2 Duo E6750 2.66 GHz or AMD Athlon 64 X2 6000+ 2.60 GHz
Memory (RAM):
2 GB RAM
Graphics Card:
Geforce GTS 250 or Radeon HD 4770
Storage:
2 GB available space