In order for you to play Construction Simulator 2015 on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 16.04 or higher
Processor (CPU):
Dual-Core Processor with 2.4 GHz
Memory (RAM):
4 GB RAM
Graphics Card:
DirectX 9 compatible graphics card with 1 GB VRAM (Geforce 400 Series or better | ATI Radeon HD 57xx or better)
Network:
Broadband Internet connection
Storage:
4500 MB available space
In order to play Construction Simulator 2015 on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 16.04 or higher
Processor (CPU):
Dual or Quad-Core Processor with 3 GHz or better recommended
Memory (RAM):
4 GB RAM
Graphics Card:
DirectX 9 compatible graphics card with 2 GB+ RAM (Geforce GTX 660 or better | ATI Radeon HD 68xx, 77xx or better)
Network:
Broadband Internet connection
Storage:
4500 MB available space