Play free puzzles, online games to make you think outside the box, games that require logical thinking, brain exercise games online for PC, Mac desktop, laptop, notebook, tablet, iPad, mobile phone. Cool strategy games, fun new brain-teaser games for kids (girls & boys), teens to play now, no download.
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Online Puzzle Games that Make You Think

Rating: 7.4/10 - 98941 votes

Play free online games that require thought, logic-based puzzles that make you think outside the box, fun brain-teaser activities for elementary / middle school students and high school teenagers, as well as for adults & seniors to enjoy.

Play hard puzzles, interactive problem solving games, challenging thinking games that involve and help to promote and improve critical thinking, creative / analytical thinking skills. Find physics-based games for the school classroom as a fun science lesson reinforcement, and to play at home with your best friends and family members.

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Play a retro-style, online Tic tac toe game for 1 and 2 players! Tic Tac Toe: Vegas is a simple, colorful version of the classic pen and paper game - Xs and Os, or Naughts and Crosses. Play against the computer or with a friend or family member, and be the first to get three Xs or Os in a horizontal, vertical, or diagonal row on a small 3X3 space grid.

Reasons to play this straight-forward, online puzzle game: Exercise your analytical thinking, strategy and decision making skills as you work to figure out the best way to bamboozle your opponent and get the coveted 3-in-a-row of your chosen symbol. Older players and adults can re-live their classroom days while younger players can experience the fun challenge of a quick-fire, virtual tic tac toe puzzle online.

Strategy to win: As the game grid is very small, ties are a commonplace occurrence in Tic Tac Toe. This means that concentration levels must be high at all times. You must try to come up with different strategies and approaches which might trick your opponent, and force a mistake. Accurate mouse clicking is also important!

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Test your logical thinking skills by solving beginner to advanced level 3D mazes! Mazes-ing is a challenging, trial and error-based maze puzzle game (for elementary age kids through high school students and grownups) where you must use the Arrow Keys on your keyboard to guide a golden ball to an Exit Portal in 30 increasingly tricky, multi-dimensional labyrinths. There are 15 classic ‘Flat Maze’ levels, and 15 trickier ‘3D Maze’ levels where you must maneuver the ball around the edges of multi-sided cubes and other shapes. Later levels feature teleporters and other quirky hindrances.

This Unity HTML5, keyboard-based, maze problem solving / brain-teaser game works on most web browsers for PC & Mac. The game can also be played on iOS and Android devices but requires an external keyboard as the Directional / Arrow Keys are used as the only control function. Smart logic and analytical thinking skills, strategy and great determination are very important as there is only one specific way to solve each maze. Good spatial awareness and visual memory skills also come into play in the 3D levels as you must try to figure out where to move the ball so that it re-appears in an advantageous position when the maze spins around.

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Play an interesting, puzzle-based platform adventure game for older kids where you change between viewpoints in order to complete various jumping and ledge-based tasks. Vision By Proxy is a clever, brain stimulating problem-solving game where you play the role of a lost, one-eyed alien who must use the ‘vision’ of different people on Earth to find the missing part to his spaceship. Your alien hero's eye is too sensitive for the earth's atmosphere so he urgently needs to enlist the help of some humans, and substitute human vision temporarily for his own in order to navigate through each level. This really is a teamwork-style challenge where you must toggle between the different visions – and use the diverse attributes and features of each viewpoint to your advantage.

Skills required: In this tricky, atmospheric and thought-provoking platformer, your problem-solving skills are regularly tested in each level. You must use a combination of analytical and logical thinking to methodically figure out the best way to advance your alien through the level, and collect the parts needed to repair his spaceship. Fast reactions and smart keyboard control skills are also important where you have to swiftly jump from ledge to ledge, and maneuver the alien around the constantly-changing terrain.

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Play a highly-strategic version of Tic-tac-toe against a sharp computer opponent or a best friend / family member! Strategic Tic-Tac-Toe is a very good, quirky one or two-player version of the simple ‘Noughts and Crosses’ game where you must line up three Os or Xs in a row on a 3X3 grid before your opponent does. However, in this more complex version of tic-tac-toe, there are nine 3X3 grids in play at the same time! To become the champ, you must prevail in three whole grids in a row!

Skills required: This fun and challenging, interactive visual puzzle & brain teaser for kids and teens requires really good concentration, quick-fire analytical thinking skills, and fast reactions. The virtual computer opponent is not the most advanced player – but is certainly quick to capitalize on any errors that you make. Whether you are playing against the computer or in a two-player matchup against a friend, you need to be thinking ahead at all times, trying to out-maneuver your opponent through good strategy - without making glaring mistakes of your own!

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Place Tetris-style blocks into specially-designated outlines in this block-based puzzle game playable on mobile phone, tablet, notebook, laptop and desktop PC! Fancy Constructor is a challenging, multi-level, visual puzzle game for kids and teens where you must maneuver different-shaped building blocks in order to fill white-colored outlines. Blocks come in different colors, shapes and sizes.

Skills required: Like in Tetris and other construction-based brain teaser games, this interactive, problem-solving puzzler requires good analytical thinking and creative engineering skills, sharp focus and concentration, and the ability to zoom out and see the ‘bigger picture’. Good strategic planning, determination and stamina are also important as you must plan your moves in advance, and when and where to place certain troublesome blocks. Trial and error also plays a part; there is no set time limit, and you must learn from your mistakes and adjust your solutions accordingly.

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Play one of the most phenomenally popular word scramble puzzles of all time on your mobile phone, tablet, notebook, laptop, or desktop PC! 4 Pics 1 Word Online is a highly-stimulating, multi-level and head-scratching, scrambled brain teaser game inspired by the legendary app where you are shown four pictures that are linked by one word (which you must then guess from the set of jumbled up letters at the bottom of the play area). Play on your own, or enlist the help of other puzzle activity enthusiasts in your family, classroom, or group of friends! See how far you can climb up the famous 4 Pics 1 Word scoreboard – each completed puzzle moves you to the next level.

Game Concept: Each level follows the same format - You are shown four completely different images, and must figure out the single word that links all four pictures. The scrambled letters of this word are displayed at the bottom of the game screen. The catch here is that there are also some trick letters in the set that are NOT part of your target word.

Example Level: For example, the four pictures might be: 1) Railroad tracks, 2) A person in a gym, 3) A teacher with a student, 4) A boy talking sternly to his dog. The answer that links all four pictures: TRAIN!
 
This online, HTML5-based, picture-based, word scramble game should work on iOS and Android devices as well as most web browsers for PC / Mac. Skills required include good analytical thinking and cognitive thinking skills, logic, a decent vocabulary range, and simple spelling skills (The level is only completed once you type in the target word spelled 100% correctly). High levels of concentration and patience are also very important. Ask for help from a best friend or family member if you get stuck on a word! You may even want to turn the game into a multiplayer activity! 

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Play a stimulating, online chess-based puzzle game with UNLIMITED levels where you must place your pieces onto safe squares on a chess board filled with attacking opponents! Chess Minefields is an innovative, interactive chess brain teaser game and strategy survival challenge where you never play the same level twice! Your task is to place white colored chess pieces onto a board that is littered with black pieces that are attacking most of the vacant squares! Playing against the clock, you must figure out which squares are ‘safe’ from opponent pressure, and quickly place your pieces there.

Skills required: This is a fun and fast-paced visual puzzle game where fast reactions, good hand-eye coordination skills, and sharp analytical thinking skills must all be applied at speed. Basic knowledge of how chess pieces move is also essential to your chances of sustained success. You must also use logic and show a willingness to use the ‘process of elimination’. Survey the board and quickly eliminate the squares ‘under attack’ from your consideration. This requires deep concentration, focus, and stamina!

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Utilize the effects of gravity, and strategically transform blocks in order to rid the game screen of all purple characters! Playable on Android and iOS mobile phone, tablet, laptop, notebook and desktop PC, Transforming Blockies is a fun, physics, gravity and timing-based puzzle (for elementary school age kids, middle & high school students) where you must use the special transformative power of each shape character to logically alter the game environment in order to eliminate all purple shapes from the platform-based levels. Some colored shapes change from round to block-like and vice versa, while others double in size when you click or tap on them. You must cleverly use these transformation actions to your advantage in each of the 40 increasingly-difficult levels. Remember: Eliminating the purple characters is your goal, and if you accidentally get rid of other colors, you fail the level!

This online, multi-level, HTML5-based, physics-based engineering puzzle game should work on iOS and Android devices as well as most web browsers for PC / Mac. To play the game with full screen, you may have to turn your device horizontally. Skills required include fast and tactful reactions as some levels require multiple transformations in quick succession. An appreciation for the effects of physics is also needed as you must use gravity to get shapes moving in many cases. Good old trial and error determination, common-sense logic, sharp analytical thinking, and creative engineering skills also come into play as you attempt to alter the game environment successfully in all 40 levels. 

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For those who love to grind out solutions to what may appear complex visual and structural puzzles: Gridlock is an extremely hard, multilevel, sliding block-based puzzle game and highly-stimulating, brainteaser activity for older kids, youth and grownups!

In each of the 40 increasingly-difficult levels of this really tough visual problem-solving challenge, you must unlock the puzzle, and find a way to slide the blue block through the opening on the right hand side of the confined playing grid. The catch is that each individual block can only be moved either vertically or horizontally. The solution is achieved using careful thought and methodical maneuvering of the other slide-able blocks that populate the small play area.

Skills / strategy required: Creative engineering and analytical thinking skills are very important in this tricky maze-like escape game. Each level has the same concept and purpose, but all 40 levels require very sharp focus, concentration and deep thought, and provide a stern examination and exercise of your visual problem solving ability.

Great patience and determination are also required - You need a strong temperament to intricately plan and visualize each move toward each solution, and go high into the Gridlock levels. Accept trial and error as an important ally in your quest – You very likely won't complete each level with ease, and must learn from your mistakes in order to progress (so good memory skills sure come in handy!).

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How good are your ball control skills? Use deft touches, reaction skills and expert mouse control to guide a bouncing, ricocheting ball into a bucket in dozens of copybook-style, obstacle-filled levels. The Circular Blot is a fun and challenging, interactive, multi-level, mouse-based skill game and physics-based strategy puzzler. Using a tethered ‘blot’ attached to your mouse cursor, you must carefully and creatively deflect a falling paper ball into an open bucket.

Reasons to play this tricky online arcade game: This is a hard problem-solving brain teaser puzzle where you must figure out the best way to use gravity to your advantage. Showcase your skillful hand-eye coordination, fast reactions and reflexes in a high-intensity, motor skills testing environment. While the concept and copybook-style graphics may be simple, the execution and difficulty level of each level is very high!

Strategy to win: Each level has numerous solutions, and you must try to use the most efficient solution to get the ball into the bucket. Trial and error (learning from your mistakes) and great determination are also very important – Surely only a ball control wizard could complete each level on the first attempt!

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Fun and challenging, multi-level connect the blocks puzzle game and brain-teaser to enjoy alone or to play with family and friends: Connect Me Factory is a tricky, visual and logic-based puzzler for both young children of elementary school age and Big Kids of all ages where you must move, drag, and/or rotate individual blocks until they ‘connect’ as one interlinking unit. Playable on mobile phone, tablet, notebook, laptop or desktop PC, you must attach the blocks to one another by matching and joining together the silver-colored ‘links’ that protrude from the sides of each block. Some blocks can be dragged around the play area, others are rotate-able, while certain blocks can be both moved and rotated to your desired position in the grid play zone.

Skills required: This online brain teaser game, based on a simple concept, requires sharp focus and analytical thinking skills, creative engineering skills, the imagination to see the big picture, problem-solving determination, strategy, and a willingness for good old trial and error are all important here. Note that there is only one correct solution in each level.

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Play an intense online game that exercises and tests your mental and physical attributes: Challenge Circle is a very hard, timing and reaction speed-based skill game where you must use really fast mouse-clicking action to navigate a constantly-moving green ball through a tricky obstacle course made of adjacent circles. Here, you must take great care not to get caught in the wrong side of a circle outline (border) or to collide with obstacles.

Excellent hand-eye coordination, good analytical thinking skills, strategy, and a cool head under pressure are essential skills required for success. Prepare to be tested to your limits in this unique maze-style puzzle challenge!

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Play a hard, interactive, visual brain teaser puzzle, and exercise your analytical thinking skills, problem solving determination, and more! Exorbis 2 is a highly-stimulating, sliding tile-based, puzzle game for older kids, teens, college students and adults with a massive 100 levels. Here, you must use good spatial awareness skills, strategy and creative engineering ability to slide orbs onto color-coordinated ‘nodes’ in as few moves as possible. And, if all of that isn't sufficiently challenging, there's even a cool ‘editor’ mode where you can create your own levels!

Reasons to play this tough, online problem-solving game: Exorbis 2 provides a stern exercise and test of your cognitive and analytical thinking skills. The difficulty level increases sharply as you progress, making this a very rewarding examination of your puzzle busting credentials!

Your concentration and stamina levels must be sharp, and the willingness for trial and error is very important. Mostly there is only one solution to a level, so you need to learn from your mistakes, and exhaust all possibilities.

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Strategically slide blocks around a confined play area in order to create a clear pathway to a dragon's castle! Dragon’s Trail is a fun, sliding tile-based game & brain teaser puzzle for elementary school age kids through middle & high school students - playable on iOS and Android mobile phone, tablet, laptop, notebook, or desktop PC. Here, you must methodically and logically move individual sections of pathway around the game grid in order to join up a clear, unbroken trail from the egg-carrying hero all the way to the dragon’s castle! Earn Gold Stars for completing levels in as few sliding moves as possible – there are a massive 40 levels in total!

This online, multi-level, HTML5-based, sliding tile / pathway construction game should work on iOS and Android devices as well as most web browsers for PC / Mac. To play the game with full screen, you may have to turn your device horizontally. Skills required include common sense logic, good analytical thinking and creative engineering skills, and problem-solving determination to focus on ‘the big picture’. Step-by-step strategic planning is really important, especially in later levels when the pathway puzzles are more complex! 

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Fluffies is a fun, unusual and challenging puzzle game for young kids where you have to free up (untangle) a bunch of cute creatures from each other. This unusual brain-teaser activity should help to improve your concentration and observation skills. The Fluffies are a family of adorable, fuzzy little guys, but their Mom has to leave them alone for a little while. She attaches them together with string so that they don’t run off – but the problem is, they’ve got all tangled up with their strings crossed over (and this is not good)! 

It’s your job to help free them so that their Mom can send them off to bed. You've got to free up the Fluffies by making sure their strings don't cross each other at any angle. But be careful because the Fluffies are full of mischief and won’t make it easy for you.

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Snail Bob 2 is a fun and wacky, interactive adventure puzzle for kids & teens where you must use your observation skills, logic, creative engineering and strategy skills along with good timing to safely guide a friendly snail through a dangerous forest environment to his grandpa's birthday party.

In this stimulating, point-and-click problem solving activity (to play online at home or in the school classroom as a creative thinking reinforcement exercise), you must remove obstacles, create pathways, block enemies, build bridges, and more in order to see Bob safely through each level. Great patience, determination and plenty of old-school trial and error are all key to your and Bob's success. Bob may normally move along at a snail's pace but the challenges come thick and fast so be alert!

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Would you please help a cute, gooey slime ball to activate and reach an exit portal? Sling is a tricky, physics-based platformer and game of skill where you control the acrobatic movement of an elastic, ‘sling-able’ green slime ball. In each of the 50 increasingly-challenging levels, you must fling this friendly slime ball character (called Sling) to multiple ‘ledge grabs’ in order to open a ‘Vortex’ which you can then escape from! However, many of the ‘grabs’ are in awkward to reach places, and are obscured or blocked by obstacles.

Skills / strategy required: This challenging, interactive, multilevel skill game requires good hand-eye coordination, analytical thinking skills combined with keen problem solving determination, lots of trial and error as well as the ability to judge angles and trajectory (The curve or path followed by a flying projectile or by any object moving under the action of some force).

‘Slinging’ the green slime ball accurately can be a tricky task but the action here is very similar to the firing of cannons or archery shooting in many online aiming & accuracy-based games. A good strategy is to first plan out your route around the level – Then pinpoint the ‘grabs’ you want to reach first, and sling away!

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Eliminate green balls from a confined, pinball-style game screen with accurate, ricocheting cannonball shots! Hardball Frenzy is a challenging and addicting aiming and accuracy-based ball shooting game and physics-based puzzle where you must clear the play area of green balls within a set number of shots. Utilizing accurate aiming and mouse control, the rebounding power of your silver cannonballs, and the contours of each level, you must hit and eliminate the green balls before your shot counter reaches zero. Remember that a ricochet game involves an element of luck also!

Reasons to play this online ball shooting game: This tricky puzzler is a quirky mix of pinball, billiard-style action, and also archery; games where accuracy is essential! Test and exercise your judgement of angles, visual prediction skills and problem-solving determination as you attempt to take out more than one green ball with each shot.

Strategy to win: Utilize good hand-eye coordination, smart judgement and your prediction skills as you try to imagine where the ball might ricochet to after your initial shot. Trial and error also comes into play as you make small but effective alterations in your aiming angles.

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Play a point and click puzzle game with a puppy-related twist! Pupzzle is a challenging and stimulating brain teaser and hidden object-based game for kids where you must click on objects and clues in the correct sequence in order to solve tricky puzzles involving a cute little puppy dog! Each scenario features a set of seemingly random objects. However, clicking on the objects in the correct order creates a chain of events that continues the fun storyline! This unusual online problem solving challenge provides an interesting test of your observation, concentration and logical thinking skills. Are you ready to unleash the determined sleuth inside of you? Happy puzzle busting!

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Use duplicate characters and expert platform jumping skills to help a little ball to escape 15 increasingly-difficult ledge-filled levels! Little Thing is a very challenging, platform-based skill game and problem-solving puzzler where you must help a lonely green ball to reach an Escape Portal in each tricky level. As well as avoiding dangerous pits and thorny spikes, you must occasionally ‘duplicate’ this little green ball, and use the resulting duplicates to your advantage for reaching higher ledges and other tasks.

Background info: ‘Little Thing’ is a rather lonely green ball character who has been stuck alone inside these difficult, confined levels. He needs your help to escape! Luckily, he has a special power that allows him to create clones of himself that can be used as stepping stones, blockages, etc.

Reasons to play this cool & ambient arcade game: If you like hard tasks, then this could definitely be described as a thinking person's game. Exercise and test your analytical thinking and strategy skills as you carefully and methodically find the solution that allows the ‘Little Thing’ (green ball) to escape each level.

Strategy to win: Good hand-eye coordination, sharp keyboard control and reaction speed are essential skills required to succeed here. On the mental side, you must have a very high concentration level at all times to work out when best to use the duplicate copies of your central character. Trial and error / learning from your mistakes is also really important. Call on your reserves of patience, stamina and determination to get the job done!

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