30. ScorpionsGAME: Pitfall (Atari 2600, 1982)
Quick, what's the only thing worse than enemies that chase you relentlessly and change up their attacks so that you never know what they'll do next? Sitting still, that's what. Especially when their poisonous tail sticks up just high enough that leaping over them has to be exact to the pixel in order to live. And even though you'd think going through the game southpaw—right to left—would afford you a bit more leeway...nope. Just more sad death for Pitfall Joe.