Tile World is a superb freeware "emulator" of Chip's Challenge, a classic tile-based puzzle game reviewed elsewhere on this site.If you have never played the original Chip's Challenge, read my review of that game first for more detailed information. Tile World, in addition to bringing the game to modern OSes, allows you to play user-created levels, and provides game-saving features, customization, better graphics, and other options that modernize Chip's Challenge for a new generation of gamers. This download, courtesy of the Chip's Challenge Corridor, features several bug fixes as well as 149 fanmade levels together called "Chip's Challenge Level Pack 2," a new set of (mostly very devious) levels for the original game designed and voted on by Chip's Challenge players. Whether or not you're a fan of the original, Tile World is a must-have if you love brainteasers or puzzle games in general. Highly recommended, and be sure to check out ChipEdit if you think you can design more clever levels than other fans ;)