Open the game now and start a New Game or load up a saved game. Now Half-Life Alyx is set up to add in the cheat codes. Enter the following into the text bar: -console -vconsole.Select Set Launch Options from the new window.Inside the Steam Library tab, right-click Half-Life Alyx.To enable the developer console, players will need to follow these steps before launching the game. The process of using cheats inside Half-Life Alyx is fairly simple but does require the player to mess with the commands a bit outside of the game.