Game would hang on installing DirectX on first run, killing the DX install process and hitting 'Play' again on Steam gets the game running.

I was running Manjaro earlier, but the game would either not boot or it would only detect one controller. I am honestly a little surprised at how pleasant the gaming experience with NixOs has been thus far.

Here are the relevant bits in my config:

{ config, lib, pkgs, ... }:

{
  environment.systemPackages = with pkgs; [
      steam
      xboxdrv
  ];

  # Based on https://nixos.wiki/wiki/AMD_GPU
  # Make sure correct kernel modules for amdgpu are used
  boot.initrd.kernelModules = [ "amdgpu" ];

  services.xserver.videoDrivers = [ "amdgpu" ];
  
  # OpenCL
  hardware.opengl.extraPackages = with pkgs; [
      rocm-opencl-icd
      rocm-opencl-runtime
  ];

  # Vulkan
  hardware.opengl.driSupport = true;
  # For 32 bit applications
  hardware.opengl.driSupport32Bit = true;
  
  # Steam
  programs.steam.enable = true;
  
  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
      "steam"
      "steam-original"
      "steam-runtime"
  ];
}