Free hidden object games and spot the difference
These are games about looking. In hidden object games you search one busy picture for the items on a list. In spot the difference you compare two nearly identical pictures and click every change between them. Planning matters less here than patience and a methodical eye. A good share of the games run a clock, and a few let you take all the time you want.
Hidden Object & Spot the Difference games

321 Diferent Patch
Pick out the one figure that differs from the rest, usually with three seconds to do it, in Relax, Normal or Extreme mode.

Anime Find The Differences
Spot the changes between pairs of anime-style scenes, with hints, timed challenges and several difficulty levels.

Christmas Differences
Twenty Christmas picture pairs with seven changes hidden in each, all to be found inside a set time.

Christmas Spot differences
Festive picture pairs to compare, with three hints in every level and a time limit to beat.

Color Madness Spot the Differences
Pixel art pairs with hidden changes, hints for the tricky ones, and no time limit at all.

Difference Find Master Game
Two almost identical images per level, a handful of small changes, and a time limit to find them in.

Find The Correct Shadow
Match a picture to the right silhouette out of three options, in Streak, Timed or Learning mode.

Hidden Easter Egg Hunt
Fifteen colourful Easter scenes, each with eggs tucked away for you to find.

Hidden Object Rooms Exploration
Eighteen levels of rooms to drag around and search, with six requested items to find in each.

Hidden Object Search 2: More Fun
A classic hidden object search split into missions, with a hidden bonus level waiting for anyone who clears them all.

Hidden Object Time Travel
Search scenes from dinosaur jungles to futuristic cities for hidden items before the clock runs down.

Hidden Objects Bakery
Six bakery shops, 24 levels and six baked treats to track down in each before the clock runs out.

Hidden Objects: Superthief
Help a thief for hire called Mrs. Smith lift relics from mansions and museums by finding the objects her clients want.

Hidden Turtle
Turtles are hiding in detailed scenes, and each level makes them a little harder to find.

Mystery Campus Spotter
Spot-the-difference pairs set around a college campus, from classrooms to dorms, with a choice of difficulty.

Mystic Object Hunt
Fifteen levels of searching old ruins and dim chambers for hidden artefacts.

Scroll and Spot
A Christmas spot-the-difference game where both pictures scroll together and five changes hide in each pair.

Seek Find
A scavenger hunt across large scenes that you pan by dragging and inspect by zooming.

Soviet Cars Differences
Fifteen pairs of Soviet car pictures, seven differences in each, one minute per level.

Spooky Halloween Hidden Pumpkin
Haunted Halloween scenes with pumpkins hidden among the ghosts and skeletons, and more of them to find as levels go on.

Spot 6 Differences
Twenty levels, two pictures in each, and exactly six changes to find before the time is up.

Spot It Find The Difference
A timed spot-the-difference game in a tall frame, with gold to earn and spend on extra items and tips.

Spot The Difference Diffsy_1
Ten differences per pair, a zoom for close checks, and the choice between taking your time or racing the clock.

Spot The Difference Wild West
Compare paired cowboy scenes from dusty towns and desert country and find every change before time is up.

Spring Difference
A spring spot-the-difference game that pays a score bonus for any time you have left over.

Spring Trails Spot The Diffs
Compare two nearly matching pictures of spring trails and find every change before the timer ends.

Super Cars Hidden Letters
Pick a supercar picture, then hunt down all 26 letters of the alphabet hidden around the image.

Valentines Hidden Alphawords
Find the letters hidden in Valentine's pictures to spell out a caption for each one, across 30 timed levels.

Farm Shadow Match
A shadow appears in the side panel; find the object in the scene that casts it, and finish quickly for bonus points.

Find the Kitten: Spot the Cat
Cats are hidden in illustrated scenes; zoom and pan to find them, with hints and rising difficulty.

Halloween Hidden Object Games : Haunted House
Over 30 autumn levels of hidden object scenes, from pumpkin patches and barns to New England towns, in three modes.

Hidden Object Search
One picture, a list of items, animals and people to find, and a minute to find them in.

Spectral Seek
Search the rooms and halls of a haunted mansion for hidden objects, with finds growing trickier the deeper you go.

Spot The Difference: Seasons
Eighty levels of paired pictures from spring, summer, autumn and winter, with five game modes to play through.
About hidden object & spot the difference puzzles
The classic hidden object format gives you a list and a scene. Hidden Object Search allows one minute per picture, and its targets include animals and people as well as objects. Some games narrow the list to a single kind of target. Find the Kitten: Spot the Cat hides only cats and gives you zoom, pan and hints to find them. Super Cars Hidden Letters hides all 26 letters of the alphabet inside a supercar picture that you choose.
Spot the difference games vary mostly in how many changes they hide and how much time they allow. Soviet Cars Differences is strict, with 15 levels of seven differences and one minute per level, which works out at under nine seconds a difference. Another hides ten per level, lets you zoom in, and treats the timer as optional. Color Madness Spot the Differences has no time limit at all and uses pixel art, where a difference can be a single block of colour that has changed.
A few games sit between the two types. Find The Correct Shadow shows a picture and three silhouettes and asks which one fits, with Streak, Timed and Learning modes. Another game turns a scene search into a shadow puzzle: the item you need is shown only as an outline in a side panel, so you are searching by shape alone. A quick odd-one-out game in the section gives three seconds per step in its Normal mode.
Screen size matters more here than in most puzzle types. Scenes in a wide landscape frame make up most of the section, and small targets are easier to find on a larger screen. The portrait games, such as Find the Kitten: Spot the Cat, fit a phone held upright. Several games offer hints, and they are best kept for the last stubborn find rather than spent early. The timed games suit people who like a little pressure. The untimed ones suit anyone who would rather study a picture properly before clicking.