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  Earth Destroyer A Free Online Game
Monochrome Rainbow! A Free Online Game
Monochrome Rainbow!
Earth Fight A Free Online Game
Earth Fight
Chimera IX A Free Online Game
Chimera IX
HappydaS A Free Online Game
HappydaS
Killer Zombies  A Free Online Game
Killer Zombies
Machiavellian A Free Online Game
Machiavellian

Online challenging Games
Kitty Photo Game

Plays: 2823
Category: BoardGame Games
A classic but amazingly challenging hidden object game by Free-Online-World.com. Demonstrate your skills and attentiveness in the role of kitty photographer. You should work fast and qualitatively. The cats at the photo sessions are as the children; they get tired with monotonous actions easily and refused to work. First you should photo all cats that were chosen by the customer in this game. Then you should find all the kittens in the children room and photo them.
Galactic Gems 2: Accelerated Game

Plays: 2821
Category: Puzzles Games
Time attack mode for the Galactic Gems 2. You have only 3 minutes to complete each level. Collect galactic gems. Discover powerful bonuses. Explore new planets. - 30 challenging levels - 5 beautiful planets - 12 powerful bonuses - tons of fun !
MindFlip Game

Plays: 2820
Category: BoardGame Games
In Mindflip, by making different color and order combinations,your goal is to find the secret one within eight tries! After each try, the dots on the right of the screen, White for correct color and Red for correct color and place, will help you guess the right order. There are different themes to choose; from Sea Oysters to Alien Spaceships! For a more challenging experience there is the harder difficulty!
SpaceBall Rebound Game

Plays: 2814
Category: Strategy Games
SpaceBall Rebound is a modified version of a classic game. Use the four paddles to keep the balls in bounds. SpaceBall Rebound gets more challenging as more balls appear & get faster during game play.
Slay the dragon Game

Plays: 2811
Category: Adventure Games
This is a simple but charming platform adventure with a soft humor laden throughout. Levels are short but numerous for easier pick up and playability, with an optional completionist goal and final challenging level.
FruitJong Mahjong Game

Plays: 2802
Category: Puzzles Games
FruitJong is a 3d mahjong game with wooden colorful blocks. It's easier to play because you can collect the pieces in the middle but you can't click the blocks underneath. The score will decrease over time but you'll get more points as you collect blocks. The game gets more challenging as you advance through its 5 levels.
Table Top Game

Plays: 2797
Category: Adventure Games
Control your ball along a challenging maze whilst also trying to find the source of the mysterious voice. Enjoy!!!
Fruit Harvesting Game

Plays: 2792
Category: BoardGame Games
Fruit Harvesting is a match 3 game with 20 challenging levels. You need to light up all the tiles to win a level.
Silver New Year Game

Plays: 2780
Category: Puzzles Games
This game is one of those few puzzle games that stays challenging and addictive without being too difficult. Solve puzzles, move the elements to burn off the line, go through the levels to score points.
Ninja Sorority Game

Plays: 2777
Category: Dress-Up Games
University is a challenging but rewarding time in every young woman's life. She learns responsibility, dedication and has fun while preparing herself for the adult world. But for the ladies of the Zeta Epsilon Delta Sorority, it also means martial arts, magic, and mission after mission of death defying action and adventure!
metal cube maniya Game

Plays: 2772
Category: BoardGame Games
Metal Cube Mania is an age old game, but designed with more challenging levels and excellent graphics. The game is well known for a casual time pass and is most challenging for the strategic game lovers. Player needs to control the paddle to hit the bricks and damage them that leads to completely demolishing them. The game packed with stunning 25 levels and submittable score to challenge the world.
Christmas Party Kissing Game

Plays: 2769
Category: Action Games
Christmas parties are great opportunities to meet with your friends and to get out with the boy you like most. But stealing a little kiss in a room full of people is not an easy job. Train the best you can with this fun and challenging girl game!
Logimino Game

Plays: 2761
Category: Puzzles Games
There are 12 different shapes, every one composed of five squares. Your task is to find there place in the dark area. With three shapes it's an easy task, but with more ones it becomes challenging.
Core Game

Plays: 2752
Category: Puzzles Games
Core is a simple but challenging game ,all you need to do is protect the core from the white balls, it will lower the energy of the core. You can also "eat" black balls as much as you can to keep your energy.
Color Follower Game

Plays: 2745
Category: Action Games
'Color Follower' is an EXTREMELY challenging abstract puzzle/skill game. You control the red agent with the mouse. The blue agent will always follow you. If you want, click and hold the mouse button to make the blue agent follow the red agent faster. Guide both red and blue agents to the exit to complete the levels. Red dies if it touches red. Blue dies if it touches blue. Collect the green agents for extra points. There are 30 levels. Completing one level unlocks the next two levels. Even if you get stuck on one level you can skip it, make progress and come back to beat it later. Thank you for playing! RatherRandom
Cherry New Year Puzzle Game

Plays: 2736
Category: Puzzles Games
This game is one of those few puzzle games that stays challenging and addictive without being too difficult. Solve puzzles, move the elements to burn off the line, go through the levels to score points.
Blackboard Typing Game

Plays: 2724
Category: Education Games
A fun typing game! Type out the correct spelling of each word. Higher levels get progressively more challenging. Have Fun!
Devilish Motorbike Game

Plays: 2716
Category: Driving Games
Devilish Motorbike is a fun motorcycle riding game that requires some key skill to help this scary devilish looking dude ride his motor bike through some challenging race courses filled with obstacles! Use arrow keys to drive motorcycle. Space bar to drive.
Real Crisis Game

Plays: 2700
Category: Action Games
Have you ever wanted to save the world? Now you can! This is a challenging trail shooter game made with real footage and real people; I hope you'll enjoy it! N.B. The game size is 14 Mb, so please be patient while it loads!
Invaders Zero 1.1 Game

Plays: 2696
Category: Action Games
v1.1 an space invaders remake with a lot of new features, including ship upgrade and a challenging AI

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Tips: Enemy graphics do not need to move. Movement is taken care of by the engine. Animals and things should walk in place.