Earlier this week Valve released a 20th (!!) anniversary update for Half Life 2. One of the major features added is developer commentary, which they shipped for Episode 1 and 2, but never for the original game. It's been very interesting to listen to the commentary so far (I'm only about half-way through the game), and I've learned several interesting things that I didn't previously know:

• In the very first platform puzzle, if you try to throw all of the crates out of the window (breaking the puzzle in the process), a new crate is spawned in while you aren't looking; very clever!
• Loot crates will typically drop whatever you're most in need of at the moment.
• Eli winks at the player when he says that Alyx is the only thing Gordon can't handle; I've played this game countless times and I've never noted that detail!
• If given long enough, seagulls will perch on the dune-buggy and poop on it! You can then clean the buggy off by driving through shallow water.

Also released was a 2-hour documentary on the making of the game, which I'm also about half-way through. It's always fun to peer behind the curtain on stuff like this.