Half-Life celebrated its 25th anniversary last Sunday, and Valve laid out a buffet of Lambda-shaped treats to mark the occasion. The company added new multiplayer maps to the game, released an hour-long documentary delving into its design, and fixed a few of its most resilient bugs. But there's one bug that escaped Valve's digital butterfly net, one that, weirdly enough, is actually seen in the 25th anniversary documentary. Now, it's been fixed...