: 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
: 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 Black Mesa-CODEX
: 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 . : To unlock the secret "Pizza" ending, you must carry Dr