It may feel like someone's pulling the old switcheroo on you, but don't be fooled. It's The New Switcheroo, a puzzle game based on the Lights Out template, where the object is to turn all the bulbs in a formation to the same color. Over the course of 30 tricky and creative levels, The New Switcheroo adds a handful of twists, both figurative and literal, to that formula. It's more than enough to keep you pondering for an hour or two.

PrismaPix is a logic puzzle game that uses elements of Minesweeper and Conceptis Puzzles' Fill-a-Pix to create a new kind of experience that's both challenging and intriguing at the same time. Use clues to fill in spaces on the grid, switching between different layers (colors" to complete the entire image.

Fighting robots plus brain-taxing logic-style puzzles? Sounds like a winner! Bureau of Steam Engineering, from the author of The Codex of Alchemical Engineering, is a visually stark game of planning, building, testing, tweaking, and building some more. You are an engineer outfitting robots who are about to go into battle with deadly weapons. Using pipes and valves you must connect each mechanical part to an engine and ensure it functions properly before unleashing the machine.

The latest brilliant-yet-simple logic puzzle game to hit the Web goes by the intriguing title of The Codex of Alchemical Engineering. Called a "game for engineers" by its creator, your goal is to build machines out of mechanical arms that move and transform basic elements to create compounds required to pass each level. It's a cerebral puzzle game that tasks you with arranging and tweaking objects on both a small and grand scale, the final result of which is a burst of euphoric gaming bliss.

Conceptis offers a variety of logical challenges at its website available to anyone. Eleven different puzzles await the intrepid solver, including familiar puzzles like Sudoku, Picross (here called "Pic-a-Pix"), Kakuro, Slitherlink, and a variety of puzzles that might even be new to logic puzzle lovers.

A logic puzzle reminiscent of Minesweeper and simple enough to pick-up and play immediately due to its similarity to other puzzles like it. And yet it feels like a fresh new puzzle all its own. A variety of puzzle sizes and difficulty levels are available to tailor your game play experience to match your own personal comfort level. It's a no-frills design that minimizes the superfluous to maximize what it does well: classic puzzle gameplay.

If you're a regular visitor here, then you probably love casual games and puzzles as much as we do. Most of the games featured here are browser-based, but once or twice we've featured a puzzle or two that require the old-fashioned method of pencil and paper. The logic puzzles from Coudal Partners are what I'm referring to, and they've just published another one, called Let's Do Lunch, for the Thanksgiving (US) holiday.

Sick of all of this sudoku nonsense flying about the place? Need a break from all this one-of-each-in-every-row-column-and-square rubbish? I've got the perfect solution for you... sorta. Kakuro—or Cross Sums or Sum Totals, depending on what school of puzzling you were raised in—is another number puzzler that has gained popularity in recent months.

Logic puzzle fans of Minesweeper and the recently reviewed Slither Link will enjoy this latest logic puzzle design from Wouter Visser, author of PLANned. The rules of Count Out are simple to understand: derive the locations of all the golden squares on the board from the numbers given.

Slither Link by Luke Harrison will tickle the fancies of you logic puzzle fans out there. While Luke gets the credit for making this polished Flash version of Slitherlink, the actual puzzle was invented by the Japanese publishing company Nikoli. Nikoli is also known for popularizing Sudoku, and publishes a number of other similar logic puzzles.

About a year and a half ago we posted a logic puzzle published by Coudal Partners, the people behind The Show and the ones responsible for recording the recent live tours of both the Pixies and Dead Can Dance. Well, they have just published a new one, and this one will surely give your brain a tickle.

Remember those word problems and logic puzzles from school? They probably weren't much fun back then when the fear of failure or a bad grade was hanging over your head. Well now there is a site filled with logic puzzles, complete with handy graphs and tables (made in Flash) that you can use to deduce your answers.