In order for you to play Mighty No. 9 on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 15.04 +, Linux Mint 17.1, SteamOS Brewmaster, Ubuntu 14.04.3 (x64)
Processor (CPU):
Intel Core 2 Quad @ 2.8 GHz or AMD Phenom X4
Memory (RAM):
4096 MB RAM
Graphics Card:
Nvidia GeForce GTX 550 Ti or AMD Radeon HD 7770
Storage:
2 GB available space
Sound Card:
Yes
In order to play Mighty No. 9 on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 15.04 +, Linux Mint 17.1, SteamOS Brewmaster, Ubuntu 14.04.3 (x64)
Processor (CPU):
Intel Core i5 @ 3.3 GHz or AMD Phenom II X6
Memory (RAM):
8192 MB RAM
Graphics Card:
Nvidia GeForce GTX 660 Ti or AMD Radeon HD 7950
Storage:
2 GB available space
Sound Card:
Yes