Although providing some enjoyment, a lack of content and innovation puts this in the shadow of Opposing Force and the original Half-Life. Unlike Opposing Force, this adds nothing new to the Half-Life experience, and in fact gives you less enemies and weapons to have fun with. It's enjoyable for the fact it uses the same basics that Half-Life did, and the pacing isn't bad, so pick it up if you're a big fan Half-Life that wants 3-4 hours of mediocre gameplay.