Half-Life and Portal had a huge impact on my life. In high school I was in the source modding community, so I’m probably too familiar with valve’s engines and games. I made a few mods, the most well known being hl2 classic, and it kinda got me into game development.

But needless to say, it’s a fantastic series. I had a chance to play alyx and it was nuts. It’s crazy how influential this series and its technology is on gaming as a whole.

And a fun fact: quake had a feature where level designers could make a light flicker with a pattern of brightnesses. There were some premade patterns you could select as well. These made it into the goldsrc engine, then source, then source 2 - so Alyx, Quake, HL1, HL2, Portal, Portal 2, and more have lights that flicker in the exact same way.