: To fix stuck scenarios or use cheats, enable the developer console via Options > Keyboard > Advanced > Enable Developer Console . You can then press the tilde ( ~ ) key to open it, as noted on Reddit .

: Unlike the original Half-Life , health is sparser in later levels. Always backtrack to wall-mounted Health Chargers before moving to a new area. Quick Stats

: To unlock the secret "Pizza" ending, you must carry Dr. Horn's pizza box from the cafeteria in Questionable Ethics all the way to the final boss in Xen, as detailed on the Combine OverWiki . Are you running into a specific error code or

: Run the game as an Administrator to ensure it has permission to write save files to your C:\Users\[YourName]\AppData or the game installation folder. Gameplay & Survival Tips

: A standard playthrough takes about 15 hours , while 100% completion (including achievements) can take up to 27 hours , according to HowLongToBeat .

: Ensure your antivirus hasn't quarantined the Steam_api64.dll file, which is a common issue with CODEX releases. You can find troubleshooting steps for this on Reddit's r/CrackSupport .

: If a level is too difficult, use these commands in the console: god : Toggles God Mode (Invincibility). give currentammo : Refills ammo for your current weapon.