This is really disappointing to hear... what is up with cheating. Neither HL or HL2 are extremely difficult games, and they both have adjustable difficulty settings for those who are not up to the task. I don't see any reason to cheat.

And Nanner, what the hell! Go beat HL1 now! ;) The last parts of that game are pretty awesome, actually. And once you beat it, play Opposing Force and Blue Shift, since they ought to be included in your GOTY edition via Steam.

Though I have just condemned cheat codes, I am actually a bit fan of them for their ability to add reply value. I think it is a total shame to use them on your first play through, but once you have beaten the game, they can add a lot of fun. I read that the reason why most newer games lack debug modes is because they actually harm sales of the games. People use cheats and beat the game and grow tired of it faster, then they turn around and sell it, contributing to a higher supply of used games on the market which in turn makes for a lower demand for brand new games, which ultimately makes the developers lose money. I would have never imagined cheat codes causing those kinds of problems, but it kind of makes sense.