On a side note, one of my favorite things about Valve’s Half Life series and also Portal is that even though they aren’t extremely lengthy, they still make you feel like you’ve come such a long way even when you’re only about halfway through the game. While playing Half Life 1 for the first time through, I remember encountering the Combine for the first time and thinking to myself “holy shit this has to be close to the end.” In reality, I had quite a ways to go. I hadn’t even made it to outer space yet. I think I’m just addicted to that feeling of accomplishment that those games give you.