Vikingod

Physics effects are just plain cool. Sure, games have technically had "physics" of some sort ever since the move to 3D, and in some cases even before. We're talking basic hit detection, collision; the stuff that prevents you from walking through the walls in Doom and determines the hit-or-miss of your rocket launcher.

In recent years, physics has evolved to push games toward world simulation. Bad guys turn into "rag dolls" and tumble over rails and down stairs realistically, and often comically. Small game-world objects, and sometimes large ones, bump, tumble, fall, and otherwise react in a more or less convincing manner. The "physics gun" in Half-Life 2 recently hammered home for everyone just how nifty physics can be.
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Read More / Source: ExtremeTech