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  Alien Invasion 2 A Free Online Game
Diamond Snatcher A Free Online Game
Diamond Snatcher
WW2 Invasion A Free Online Game
WW2 Invasion
Pacific 1941 A Free Online Game
Pacific 1941
shoot em
shoot em'
Mouse Revolt A Free Online Game
Mouse Revolt
boom doom A Free Online Game
boom doom

Online Challenging Games
Motorcycle Puzzles Game

Plays: 3241
Category: Puzzles Games
Time to rev up your mind with some fun and challenging motorcycle bike puzzles. Enjoy these 5 different motorcycle puzzles in this fun motor bike puzzle game.
Dinosaurs Life Mahjong Game

Plays: 3238
Category: BoardGame Games
A classic but amazingly challenging mahjong game by Play-Free-Arcade.com. Feel the terrible atmosphere of the cataclysm of chalk period. This mahjong game requires your skill, experience, memory and luck. Click at the same stones with two opened adjacent sides. Delete all tiles on the playing board and run next level.
Superhero Difference Game

Plays: 3236
Category: Puzzles Games
The big city is in a big danger: some giant monsters invaded the place and want to destroy everything around! People are so scared and nobody can fight these huge creatures. Only a superhero could save them and their city. Follow this story and see what happens till the end in our new difference game. Discover the differences between the images in each level, to unlock the new one and find out what happens in the next chapter of the story. Show your attention and concentration skills and find all the differences between the sets of pictures in each level to be able to get to the end of this challenging story! Have fun!
Flip It Game

Plays: 3227
Category: Puzzles Games
This is a challenging mind game. The purpose of this game is to flip all the pegs to the opposite side. The difficult part is that when you flip a peg, its surrounding pegs will also be flipped.
Hot Pepper Puzzle Game

Plays: 3221
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.
Equivalent Food Stuffs Game

Plays: 3209
Category: Other Games
A challenging Game From gazzyboy, the conveyers carries the food Orders requested, all you have to do is pick the correct food from the food court and place it in the Conveyer and succeed the Levels.
Dangerous Dungeons Game

Plays: 3207
Category: Action Games
Dangerous Dungeons tells us a story about Timmy, a little thief- err, treasure hunter, who has arrived to a deep and dark dungeon, ready to face the dangers inside to claim the biggest treasure in the world. DD Has been made to look and play like old classic platformers, so it can be quite challenging, so watch out!
Spaze Invaderz Game

Plays: 3199
Category: Action Games
Spaze Invaderz is a new version of the classic Taito game "Space Invaders". It's a challenging game that rewards fast reflexes and you will soon build up the best strategy to get rid of the aliens. This games features original graphics and in addition to the new standard graphics mode, the game features a retro mode where the colors emulate the sequel of the original SI game.
Ivan's League of Super Flankers Game

Plays: 3192
Category: Action Games
Take part in a Jet fighter game with up to 13 different weapons and 9 different jets. Unlimited levels, each level gets more challenging.
Dreams New Year Puzzle Game

Plays: 3192
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.
With the Wind Game

Plays: 3190
Category: Puzzles Games
A challenging spot the difference game made with unique modern artwork created in conjunction with the original artist.
Hex-B Game

Plays: 3188
Category: Action Games
Bring the Bee home after a hard day working with this quick and challenging puzzle that will make your brain and reflexes work hard.
Brains Still Roll Game

Plays: 3184
Category: Puzzles Games
Adorable brain-eating zombies are back in Brains Still Roll! You think you're done feeding the zombies? NAH... You still have a long way to go... Now proceed to Bored's Zombie Research Building B & be careful with your hand...zombies might mistakenly think it is the food! Solve more challenging puzzles and go in the Observation Room to watch the zombies you earned eat endless brains!
Spartacus Game

Plays: 3183
Category: Action Games
You play as Spartacus, as legend says: a true warrior fighting his freedom out of the gladiator arena. Fight 8 challenging levels, unique boss enemies and beat off your enemies with style in the Cinematic mode.
Zombiesweeper Game

Plays: 3168
Category: BoardGame Games
Simple but challenging strategy game that will provide you lots of fun. Everyone know the basics.
Ne Touchez Pas! Game

Plays: 3166
Category: Action Games
Ne Touchez Pas! is a challenging arcade-style game containing 40 levels that will push you to the limit. You play as a twitchy bird and must escape a labyrinth of increasingly testing levels. All in monochromatic glory.
Cheesee the Rat Game

Plays: 3166
Category: Action Games
With very cool graphics and super challenging game-play, you can join the quest of finding the yummy cheese along with Cheese, the rat.
Flooded Village Holland Game

Plays: 3160
Category: Action Games
Welcome to the Netherlands! Dig rivers and flip switches to guide water through the village. Water the cows, help the sailors set sail, but be careful not to drown the villagers! This game has innovative game-play, challenging puzzles, a whole new cast of cute characters, animations and special effects, high quality stereo sound and custom soundtrack, and 28 brand new levels!
World Flag Memory-6 Game

Plays: 3156
Category: BoardGame Games
Play a wonderful memory game with your national flag. You will be able to play challenging 6 levels with very nice art. It will educate you to know about different countries flags.
Booger Ball Game

Plays: 3152
Category: Action Games
Booger Ball is a challenging volleyball game, keep your blob under control and try to beat the computer. Based on GISH physics.

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Tips: When using the Multiple Opponents option you must create an SWF where each frame is a different opponent. It will detect how many frames you have and randomly choose one each time they spawn. Each individual frame can have it's own independant animating movieclip inside.