How do you mod the Hacker Evolution Untold game

Use the built-in mod editor. It's in the Start menu>All Programs>Hacker Evolution Untold>Hacker Evolution Untold - Mod Editor. It can also be found at C:\Program Files\Hacker Evolution Untold\Hacker Evolution Untold Mod Editor.exe. However, the mod editor is not supported in the Game Giveaway of the Day version.