Mechanical AI Made In LittleBigPlanet 65
Laurens writes "Despite slow sales of LittleBigPlanet in the USA, you might have heard of the calculator made within the game, but now that has been topped. I found a fully-functioning AI machine which plays Tic-Tac-Toe against the player. Considering that you can't actually program in LBP, this feat is impressive; it is a machine which has mechanical AND and OR ports made of pistons and proximity detectors, a physically moving Program Counter, and hundreds of wires. The level is called 'Tic Tac Toe' and is by author Cristel."
Another player created a similarly amazing level that is a recreation of John Conway's Game of Life.