User blog comment:Tomahawk23/Royce & Isabelle VS Gordon Freeman/@comment-143604-20111106214800/@comment-143604-20111108001318

Because this is the HALF-LIFE crossbow we're talking about here. That's like saying "how can the jedi still use lightsabers, there's a reason swords were fazed out as a practacle weapon". The Crossbow from the games is pretty much functionally the same as a sniper, complete with range and accuracy, but is powerful enough to one-hit a turret and has a built-in toxin that poisons its targets as well.