One of our mods, Waffle, shares his thoughts on whether or not Half-Life 2 is worth it's salt. The physics, are what makes you forget about the let downs, the broken anticipation. They make you want to find Valve and hug them. The physics are that good. Friction, buoyancy and gravity are all at work. And it really is fantastic, watching a bottle roll down a slope before hitting a cardboard box and stopping softly. The way pieces of wood act as stepping stones, before sinking in to the depths with all too much realism. Of course, the whole review, can be had over here.