{
  pkgs,
  lib,
  ...
}: {
  nixpkgs.config.allowUnfreePredicate = pkg:
    builtins.elem (lib.getName pkg) [
      "steam"
      "steam-original"
      "steam-unwrapped"
      "steam-run"
    ];

  programs = {
    steam = {
      enable = true;
      gamescopeSession.enable = true;

      remotePlay.openFirewall = true;
      dedicatedServer.openFirewall = true;
      localNetworkGameTransfers.openFirewall = true;
    };

    gamemode.enable = true;
  };

  environment.systemPackages = with pkgs; [
    steamcmd

    mangohud
    protonup-qt
    lutris
    bottles
    heroic
  ];
}