Portal Pumpkin Google engineer Neil Fraser blew gamers' minds when he created a robotic sentry turret pumpkin based on the video game Portal in 2010. Gears and cams inside the pumpkin body allow it to pan left and right and pitch up and down looking for targets. On his blog, Fraser described the process of making the turret pumpkin as "building a ship in a bottle. A wet, slimy bottle. Neil Fraser October 31, 2012, 11:31 a.m. Not so long ago, making a jack-o-lantern was as simple as cutting out three triangles and creating a wide, leering jaggedy smile. Put a candle in the middle and you're done. Simple, classic, easy. But times are changing. Over the past several years pumpkin hackers have been experimenting with LED lights, circuit boards, and even robotics to soup up their pumpkins. Previous experiments in pumpkin hacking have culminated in what we think may be the greatest pumpkin hack of all time: the Tetris Pumpkin, by Nathan Pryor, a programmer based in Washington. Using 128 LED lights, he created a playable Tetris game in a pumpkin, complete with a joystick built into the pumpkin's stem. In a blog post describing what we're calling the Great Tetris Pumpkin Project in detail, Pryor writes that the entire pumpkin hack took him about 12 hours to complete. It took him three tries just to find the perfect pumpkin. If you are dazzled by the Tetris Pumpkin like we are, then check out these five cool pumpkin hacks.