Half-Life changes the way you think about life; it’s not a normal first-person shooter. As someone who grew up playing Doom, the first time I played Half-Life I had one of the most important realizations as a child: you don’t need that much skill if you actually think, and running from problems is super useful and acceptable sometimes (one of the reasons that I also loved playing Resident Evil on my PSone back then, but it scared the hell out of me).