Here are the Underrail: Heavy Duty System Requirements (Minimum)
CPU: Info
CPU SPEED: 1.6 GHz
RAM: 2 GB
VIDEO CARD: GPU that supports shader model 2.0
PIXEL SHADER: 2.0
VERTEX SHADER: 2.0
OS: Windows XP SP3
FREE DISK SPACE: 3 GB
CPU: Info
CPU SPEED: 1.6 GHz
RAM: 2 GB
VIDEO CARD: GPU that supports shader model 2.0
PIXEL SHADER: 2.0
VERTEX SHADER: 2.0
OS: Windows XP SP3
FREE DISK SPACE: 3 GB