Unity56TestLinux.x86 works fine for me on my desktop, but Unity56TestLinux.x86_64 crashes:
Set current directory to /steam/SteamApps/common/AI War 2/BleedingEdgeTest
Found path: /steam/SteamApps/common/AI War 2/BleedingEdgeTest/Unity56TestLinux.x86_64
Mono path[0] = '/steam/SteamApps/common/AI War 2/BleedingEdgeTest/Unity56TestLinux_Data/Managed'
Mono path[1] = '/steam/SteamApps/common/AI War 2/BleedingEdgeTest/Unity56TestLinux_Data/Mono'
Mono config path = '/steam/SteamApps/common/AI War 2/BleedingEdgeTest/Unity56TestLinux_Data/Mono/etc'
Preloaded 'ScreenSelector.so'
Player data archive not found at `/steam/SteamApps/common/AI War 2/BleedingEdgeTest/Unity56TestLinux_Data/data.unity3d`, using local filesystemAborted (core dumped)
Adding -force-glcoreXY: with XY of any of 32, 33, 40, 41, 42, 43, 44 or 45 makes it work.
OS: Arch Linux
Kernel: x86_64 Linux 4.8.13-1-ARCH
CPU: Intel Core i7-3820 CPU @ 3.6GHz
GPU: Gallium 0.4 on AMD TAHITI (DRM 2.46.0 / 4.8.13-1-ARCH, LLVM 3.9.1)
RAM: 15991MiB