Well. I've seen a lot of "USER" made videos with a very different version of Half-Life. There's some comments on the videos says they're videos from an early alpha version of Half-Life. But they doubt if it was leaked or wasn't. Then I've seen in a lot of forums about that version of Half-Life. I found that there's a package including Half-Life: Day One with TFC 1.5 called Initial Encounter with a download link but it isn't work anymore. Then I was wondering if anyone here have this package and want to share it with me. Thanks.
Have a nice day.