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  Defend The Tree Ship A Free Online Game
Kid Chaos Ultra R2 A Free Online Game
Kid Chaos Ultra R2
Atomic Defense A Free Online Game
Atomic Defense
Fish Army A Free Online Game
Fish Army
Revenge of Powder Monkey A Free Online Game
Revenge of Powder Monkey
Terrorist Attacks  A Free Online Game
Terrorist Attacks
VAPE THIS, ALIEN SCUM A Free Online Game
VAPE THIS, ALIEN SCUM

Online Challenging Games
Palatable Pizza Recipe Game

Plays: 1839
Category: Puzzles Games
A classic but amazingly challenging cooking game by Online-Girl-Games.com. You have a recipe of tasty pizza so do not lose time and start to cook! Rule with mouse left button. The game is great for kids and other peoples who love to cook.
Chime Breaker Game

Plays: 1828
Category: Action Games
A block-breaker game with 10 progressively challenging levels filled with musical chimes.
Tropical Uphill Driver Game

Plays: 1826
Category: Driving Games
Drive your giant monster jeep with spike roller, crashing and destroying anything that gets on your way. Reach your helicopter without crashing your jeep. Collect as many money as you can, don't lose the balance and you will be the best Jungle War Champion! Drive your monster 4x4 jeep with arrows. Have a lot of fun playing this free classic but amazingly challenging uphill racing game.
Xtreme Cars Hidden Letters Game

Plays: 1825
Category: Puzzles Games
Well, Xtreme Cars Hidden Letters belongs to a certainly one of the most challenging type of flash games around. It's related with detecting the hidden letters from the pictures and it's not always easy to achieve that. In this game, there are 3 images offered to play into and each of them holds a number of hidden letters that are not so easy to detect. So, focus and try to notice them to be able to successfully finish each of the pictures. To be able to play, use only the mouse key to press on the letter every time you detect one of them on the pictures. Good luck.
Bloosso Run Game

Plays: 1821
Category: Action Games
An addictive running action game. Something really terrible has happened in the land of Bloosso! Run for your life, unlock achievements, collect resources to buy cool items.
The Unexpected Bug Game

Plays: 1821
Category: Action Games
The Unexpected Bug is a challenging action scrolling atari-like retro game where you need to avoid and kill robots that tries to kill you! Try to fix the “Bug” in this running-like game full of upgrade and achievements!
BeatTheLevels Game

Plays: 1808
Category: Action Games
An entertaining and challenging action/platform flash game with over 20 uniqe levels. Can you beat each level to, well, beat the game?
Super Vehicles Memory Game

Plays: 1801
Category: Memory Games
You've spent years collecting cards of your favorite cars, yet last night's storm got in your house and blew them all over the place. It is now time to find them all and re-arrange them in the proper order, but don't slack around as you don't exactly have all the time in the world to do it. In Super Vehicles Memory there is a total of six levels for you to complete, with each one becoming increasingly challenging, featuring more symbols without giving you too much more time to sort through them. The controls are about as simple as they ever get as the only thing you need to use is the left mouse button. Once you click on a square, it reveals its symbol, and when you click on two of them one of two different things can happen: either they match and the squares disappear, either they don't and revert back to their hidden position.
Julia Holidays Game

Plays: 1791
Category: Puzzles Games
A classic but amazingly challenging hidden object game by Free-Escape-Room.com. Julia celebrated her birthday in office last night and now her goal is to clean her room quickly. Help her to do this as quickly as possible. Game consist nice graphics and nice music.
Motocross Madness 2 Game

Plays: 1790
Category: Sports Games
Start a new adventure with Motocross Madness 2 game. Drive your motorcycle as fast as you can on a ruff mountain terrain. It may look simple to drive but this is a challenging game and it is difficult to keep your balance. Finish all the eight levels in the Motocross Madness 2 game to prove you are the best motorcycle driver ever. Good luck and have fun!
SUNKEN WORLD Game

Plays: 1789
Category: Action Games
Take control of an enormous Kraken beast defending a mythical underwater nation from the invading humans. Think 'Avatar' combined with '20,000 Leagues Under the Sea' Attractive graphics, unique theme, addictive and challenging gameplay. Build experience points to unlock special powers. Great particle-fx explosions! (Please avoid playing this game using Chrome. There is a known lag issue caused by the browser itself)
Motorcycle Forest Bike Riding Game

Plays: 1787
Category: Driving Games
Take your bike out for a challenging journey through the forest in this cool bike riding games.
Fort Defender Game

Plays: 1782
Category: Action Games
The game involves map style of theme where the player needs to defend from the conquerors from other forts to enter in to their's. Player uses mouse to click at the desired place to install the defending weapon to obstruct the enemy trespassers to enter the fort. As the time moves the speed and number of enemies goes up that makes the defender feel more challenging to play.
Abstract Defense Game

Plays: 1779
Category: Action Games
Abstract Defense is a challenging skill based action defense game, with simple and fun mechanics that requires fast response in order to survive as long as possible. Earn various achievements and go for the highest score!
TheBall Game

Plays: 1775
Category: Action Games
Help ‘TheBall’ to accomplish his journey by jumping and rolling in this platformer with unique graphic style. 20 challenging levels will test your reflexes. ‘You want More?’Three gold medals can be earned in each level for the most persevering and skilled players.
Stephany at fair Game

Plays: 1767
Category: Puzzles Games
A classic but amazingly challenging hidden object game by Games-Online-Zone.com. You are at the fair and your goal is to find and buy statuettes and lanterns as well as to take part in the fair contest - to spot differences between two pictures. Have a lot of fun playing this free game.
Find Christmas Cake Game

Plays: 1762
Category: Puzzles Games
This is the 526th escape game from enagames.com. The story of this game is to find santa cake and enjoy this christmas eve with your family and friends. Assume that one day you heard a news like santa kept his christmas cake inside the house and challenging you to find the cake. Try to get the cake and enjoy the day. Click on the objects to interact with them and solve simple puzzles. Play enagames and have fun!
Kolobok Game

Plays: 1758
Category: Action Games
Kolobok features 20 challenging levels a revolutionary platformer in which you can not jump. Roll, fly, freeze and burn Kolobok to reach the exit of each level. Eat the different mushrooms to get the special abilities. Enjoy the new gameplay mechanics and complete all the levels as quickly as you can. Play using the arrow or WASD keys.
Easter Bunny Egg Collector Game

Plays: 1750
Category: Other Games
What would you say about teaming up with the sweet Easter bunny this year and lending him a helping hand with all that demanding and nonetheless fun-filled eggs collecting marathon just before Easter Day? Carry out all the three skills-challenging tasks prepared for you in this game, gather as many lovely special Easter eggs as you can, and impress your new long eared friend, proving him that you're skillful enough to be his new reliable little helper!
Archer Game

Plays: 1747
Category: Strategy Games
Have you ever fancied being a ranger like those fantasy characters you love so much? Well, now you can in Archer! Pick up a bow and a quiver full of arrows and get shooting! Don’t worry you won’t be shooting at anything alive or moving. This addictive free online hunting game has you blasting arrows at targets in many fun and interesting ways. Forget traditional archery ranges, because you’ll be shooting your way past obstacles, and using physics based gameplay to hit those targets. You can use the power of your shot to slam through objects blocking the way and hit your target, all in one fell swoop. To control your shot you must swipe your finger or drag the mouse across the screen to adjust the shot power, and then release once you’ve chosen the trajectory you want. There are multiple levels each with varying challenge difficulties that make for a seemingly endless stream of fun scenarios and results. The farther you progress in the game the harder and more challenging the levels become. The puzzles can be compared to other slingshot based games where you have to shoot a variety of birds at pigs – you know the one we’re talking about! If you find that you can’t reach a particular target, you can swap out to the bouncy arrows – one of many different ammunition types. What are you waiting for? Get out there and start shooting targets! Compare your scores with friends and family to see who can get the best. Don’t forget that this game can be played from any smartphone, tablet or computer. Choose your weapon of choice so to speak and aim for those targets! There’s a lot less to clean up when you’ve finished a game of archer too, and nobody likes to clean.

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Tips: For things like scopes or hands which are either on or can go to the edge of the screen you should go to Player|Advanced and change the Bounds parameter to around 10 or so. This will give you a point based bounding box instead of a auto bounding box.