About Cogs

Cogs is a puzzle game where players build machines from sliding tiles. Players can choose from 50 levels and 3 gameplay modes. New puzzles are unlocked by building contraptions quickly and efficiently.

  • Inventor Mode: Starting with simple puzzles, players are introduced to the widgets that are used to build machines — gears, pipes, balloons, chimes, hammers, wheels, props, and more.
  • Time Challenge Mode: If you finish a puzzle in Inventor Mode, it will be unlocked here. This time, it will take fewer moves to reach a solution, but you only have 30 seconds to find it.
  • Move Challenge Mode: Take your time and plan ahead. Every click counts when you only get ten moves to find a solution.

You can find the YouTube trailer, screenshots, download links and more at the official Cogs website.

What Makes Cogs Unique

Puzzle fans aren't getting their fair share. Every year, gaming hardware gets more and more powerful. Mid-range computers can render tens of thousands of polygons at 60 frames per second and the big studios are using all of that power to create incredibly realistic, compelling experiences.

And then there's the puzzle genre. For those of us who prefer more mentally engaging content, we're mostly stuck with flat, cartoony match-three games that have hardly changed in a decade. Puzzlers deserve better.

So when we started designing Cogs, we decided to bring players three-dimensional realism, attention to detail and quality puzzles that raise the bar for the entire genre.

We designed more than 50 puzzles with an astonishing variety. There are flying contraptions, music machines, roving tanks, jack-in-the-boxes and more than enough other imaginative inventions that gameplay never feels repetitive.

We wanted nothing to break the illusion of interacting with a massive steam-driven machine, so we made every aspect of the user interface with analog widgets from the odometer-style counters to the revolving puzzle descriptions to the massive iris in the background that opens to reveal each new puzzle.

Cogs has already been a success on the PC, but players and reviewers unanimously agree: We want this kind of sophisticated puzzle game on our iPhones. They'll get their wish in January 2010.


Indie Game Challenge 2010: Grand prize in the professional category, jury's award for Achievement in Art Direction and jury's award for Achievement in Gameplay.

Independent Game Festival 2010: Finalist for Excellence in Game Design.

IndieCade 2009: Finalist.

Cogs Timeline

From conception to completion, it took Cogs nearly 5 years to make it to market. Rob Jagnow came up with the basic concept around 2004 and it stewed in his mind until January 2006 when he wrote the first prototype. It continued as an independent part-time project for years before Brendan Mauro came on board as the digial artist in May of 2008 to replace Rob's placeholder artwork with the polished steampunk design that you see today. Sound effects and the game's three music tracks were all done by Luke Gilbert of Elepant Audio.

One programmer, one artist and one musician.

Lazy 8 Studios released the PC version of Cogs through Steam on April 14, 2009. Direct2Drive and GamersGate joined the list of distributors on July 12 and October 14, 2009 respectively.

January 27, 2010: Cogs for the iPhone goes live in the iTunes app store.

February 19, 2010: Cogs wins the $100,000 grand prize in the professional category at the Indie Game Challenge in Las Vegas, Nevada. It also wins the jury award for Achivement in Art Direction and the jury award for Achievement in Gameplay.

April 3, 2010: Cogs HD is released as a launch title for the iPad.

April, 2011: Cogs participates as one of the indie games involved in the launch of Portal 2 in an Alternate Reality Game (ARG). Challenging riddles were woven into Cogs as part of a huge puzzle that was solved by tens of thousands of players.

March, 2012: Cogs launches on Android.

The Team

Rob Jagnow is the founder of Lazy 8 Studios and the sole programmer and puzzle designer for Cogs. He has a Ph.D. in Computer Science from MIT and draws from his previous work experiences at Pixar and Demiurge Studios. He works out of his home office in San Francisco, CA.

Brendan Mauro did all of the artwork for Cogs, including most of the user interface design. He has a passion for Legos and steampunk design.

Luke Gilbert composed the music for Cogs and created all of the sound effects. He's the founder of Elepant Audio in San Francisco, CA.

The Puzzles

  • Gears: Rearrange the gears so that they turn the gold gear. Tap a tile to slide into an adjacent empty space.
  • Dimensions: Get power to the prop. Drag with two fingers to rotate the box.
  • Pipes: Redirect the steam to drive the gold gear. To keep your move count low, try moving more than one tile at once.
  • One Chime: Some gears have pegs that can be used to interact with other gadgets. Use the pegged gear to push the hammer and strike the chime.
  • Jack-in-the-Box: Turn the crank. Drag with two fingers to rotate the box.
  • Simulchime: Strike both chimes simultaneously. You'll need to time your movements carefully. Tap the button to hear the target tune.
  • One Balloon: Fill the balloon with steam. Slide two or more tiles at once to move quickly and keep your move count low.
  • Trike: Turn the two big wheels simultaneously.
  • Two Sided: Solve both sides simultaneously to get steam to the gold gear. Drag with two fingers to spin the puzzle.
  • Silence: Stop the chimes!
  • Synchro: Get both clocks to turn at the same speed.
  • Wiggle: Redirect the steam to drive the gold gear.
  • Leaks: Get steam power to the gold gear. There can't be any pressure leaks in the system, so you'll need to build a closed loop.
  • Color Match: Balloons can only be filled with steam of the same color.
  • Color Mix: Yellow and blue make green.
  • Pipes & Gears: Turn the gold gear. Use steam power to get the gears moving.
  • Spinner: Get fuel to all four corners.
  • Moving Targets: Play a tune. For this and any level where you make music, tap the button to hear the target tune.
  • Leaks II: This may look familiar, but it's trickier than it appears. Plug all leaks to turn the gear.
  • Siege Engine: Get fuel to the turret and turn the two big wheels.
  • Gear Layers: Turn the gold gear.
  • Pipe Box: Turn the crank. You only need to use one of the three steam sources.
  • Triple Prop: Get all three props to turn.
  • Rocketship: Get power to all six engines without any other leaks.
  • Steam Crossing: Fill both balloons.
  • Metagear Shuffle: Complete the gear.
  • Radiator: Inflate the balloon.
  • Two Gears: Piece together these two intermeshing gears. You'll need to really think ahead to get some pieces in place.
  • Music Box: Play a tune. Tap the button to hear the target tune.
  • Stop: This whole grid is being powered by the copper gear. Can you stop all the gold gears from turning?
  • Hidden Pipes: Inflate both balloons.
  • Podcopter: Make it fly.
  • Chime Pyramid: Arrange the gears to play a tune. To hear the target tune, press the _ button.
  • Hovercube: You'll need to inflate all four balloons to get this off the ground.
  • Helios: You'll have to really get the propeller moving quickly to get this off the ground.
  • Hoverpod: Inflate the balloon.
  • Flywheel: Turn the outer wheel.
  • Four Gears: Two more in the mix
  • Sliding Scale: Play a tune. To hear the target tune, press the button.
  • Gear Shuffle: Turn all four gold gears simultaneously.
  • Moving Targets II: Play a tune. To hear the target tune, press the button.
  • Plumber: Power the gold gear without any leaks.
  • Woven Pipes: Turn both gold gears.
  • Churn: Get all of the gold gears to turn simultaneously.
  • Pipe Shuffle: Get steam to all three gold gears.
  • Rocketship II: Get power to all six engines without any other leaks.
  • Simulchime II: Speed up one chime and slow down the other so they play simultaneously and at the same speed. Press the button for a preview of what you should hear.
  • Spinwheel: Get steam to all four engines.
  • Leaks Deluxe: Plug all leaks on both sides.
  • Dual Hoverpod: Inflate both balloons. As usual, balloons can only be filled with steam of the same color.
  • End Credits: Turn the crank to roll the credits.