When we first heard that Left 4 Dead 2 would feature a "Realism Mode," our first reaction was to hide in the closet, swaddled in the comfort of old coats and dust bunnies. Left 4 Dead wasn't exactly an easy game to begin with, so hearing that there would be an even more realistic, more punishing difficulty mode was a bit difficult to swallow. Now, G4TV has been kind enough to assemble a brief walkthrough of one level played in Realism Mode and ... it really doesn't look all that bad. X-Play's Abbie Heppe explains there are a few major differences. One, dead players will stay dead unless revived with a defibrillator -- keep in mind that each player can carry a defibrillator or a med kit, not both. Second, zombies must be killed with headshots, though it's hard to tell how strict this rule is in the video. Third, players have to be much closer to items in order to pick them up. Finally, there are many, many more witches. See it for yourself after the break. [Via Evil Avatar]