Build Free Online Games - Play over 40,000 games online including online games , internet games , flash games , and all your own free games.
  Snipe The Spider A Free Online Game
Cops vs Thugs A Free Online Game
Cops vs Thugs
Air Atack A Free Online Game
Air Atack
Battle for Paris 2: The Recked Air Field A Free Online Game
Battle for Paris 2: The Recked Air Field
Alien Empire A Free Online Game
Alien Empire
Brick Brake A Free Online Game
Brick Brake
space battle 5 A Free Online Game
space battle 5

Free Online O Games

OnlyWars A Free Adventure Game
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OnlyWars Game


Plays: 3607
Category: Adventure Games
OnlyWars is a futuristic-based shooter styled scroller game made by Only-Games.co.uk. Use the Arrow keys to move and the space bar to shoot in this all-action game!
Onomastica A Free Action Game
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Onomastica Game


Plays: 2614
Category: Action Games
Linguistic arcade game in Pop Art style.
ononmin A Free Action Game
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ononmin Game


Plays: 3265
Category: Action Games
Only One Minute. To shoot the ball on longest possible path.
Onristu A Free Other Game
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Onristu Game


Plays: 2682
Category: Other Games
Help the world of Onristu free themselves from the darkness. Play through story mode with cute animated cut scenes and fun game play, or skip right to the action in free play mode.
Onslaught 2.1 A Free Shooting Game
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Onslaught 2.1 Game


Plays: 6525
Category: Shooting Games
Onslaught 2.1: All the fun of Onslaught but with fresh challenges.
Onslaught 2.2 A Free Strategy Game
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Onslaught 2.2 Game


Plays: 25056
Category: Strategy Games
A tower defence style game with many different types of turrets, combos, upgrades, enemies, maps and lots, lots more. Map editor, modding interface, challenges, the list goes on.
Onslaught Defense A Free Action Game
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Onslaught Defense Game


Plays: 1509
Category: Action Games
Wield powerful weapons to defend your castle against hordes of dragons and demons in this action-packed castle defense game! Upgrade powerful swords, axes and spears to earn the mighty runeforge! How many monsters can you slay before your castle will be overrun?
Onslaught Tower Defence A Free Fighting Game
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Onslaught Tower Defence Game


Plays: 6015
Category: Fighting Games
This is a re-make of the game Onslaught Tower Defense, made to be less resource intensive and add new features such as achievements and coins. This games is not complete, but it is playable. Currently you can choose one of 9 maps in the yellow and blue squares, choose the number of waves, and begin playing. You can build 3 towers and they will proceed to attack enemies that come in waves of 10 until all waves are done. Click next wave when all the enemies from your current wave are on screen to advance to the next wave, or when the 20 seconds are up or when all the enemies have been killed. Clicking towers will allow you to select them, and from there upgrade damage, rate of fire, or sell the turret. I'm working on adding the ability to upgrade range, move turrets, have more achievements that unlock abilities, widen the store, and adding more towers.
OobakoO A Free Puzzles Game
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OobakoO Game


Plays: 3172
Category: Puzzles Games
Simple puzzle/arcade type game where your goal is to clear all of the orbs on the play area. Swap colors around to make new, complex colors to destroy more orbs.
OokiCookie A Free Action Game
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OokiCookie Game


Plays: 2218
Category: Action Games
Do you like cookies? Then try OokiCookie! A colorful avoider game. Do not get caught by the hungry but very cute bushes. 21 exciting levels are waiting for you. Many awards and achievements. Do not miss!
Oops .. Blub A Free Other Game
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Oops .. Blub Game


Plays: 12843
Category: Other Games
You must make bubbles to coop in the butterflies in it. When the bubbles (with a butterfly) already steady fly on the sky, jump to catch it. Complete your progress level until 100% (reach 1000 point). There're 3 random bonuses that you can used to barter your butterflies, it can make your progress level complete faster.
OopsAUfo A Free Action Game
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OopsAUfo Game


Plays: 2056
Category: Action Games
A shoot em up with cartoonish graphics and a challenging gameplay!
Oozing Empires A Free BoardGame Game
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Oozing Empires Game


Plays: 1600
Category: BoardGame Games
Grow your empire to dominate the world! The Black and White empires take turns to play. At each turn, an empire chooses a colour and absorbs all the countries of that colour that touch it. The first empire to control half the map wins. The settings screen allows you to choose different map sizes, and there are three levels of computer opponent skill. You can also select two human players for hot-seat play.
Oozy A Free Action Game
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Oozy Game


Plays: 2183
Category: Action Games
The Life Flower has been stolen by a crazy wizard. It's up to Oozy and his Fly companion to go to wizard's floating palace and retrieve the flower! - Travel across 40 stages in 4 unique locations and encounter fearsome foes! - Battle against 4 unique bosses! - Collect the Lime Jelly hidden on every stage to unlock the true ending.
Open Doors A Free Puzzles Game
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Open Doors Game


Plays: 8950
Category: Puzzles Games
Simply move the square to the X. Moving through lots of doors along the way.
Open Doors 2 A Free Puzzles Game
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Open Doors 2 Game


Plays: 6688
Category: Puzzles Games
Simply move the square to the X… again! But now there’s double-doors, collapsible floors, and switches. Plus, get medals for completing the puzzle fast and in the least number of moves.
Open Gem Shooter A Free Action Game
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Open Gem Shooter Game


Plays: 3420
Category: Action Games
Open Gem Shooter is a 2D shooter game taking place in space. Destroy all the blue gems and avoid them as they have a deadly poisson. You have 3 tries commander.
Open Park Wedding A Free Customize Game
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Open Park Wedding Game


Plays: 2033
Category: Customize Games
Stephanie is an innovative person and so she has planned to get wedded in an open park. She has got her new wedding dress but still she wants you to help her get ready for the wedding.
Open shoulder dress A Free Dress-Up Game
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Open shoulder dress Game


Plays: 1991
Category: Dress-Up Games
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Open Source Rock Paper Scissors A Free Casino Game
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Open Source Rock Paper Scissors Game


Plays: 4454
Category: Casino Games
Rock Paper Scissors, a finger-guessing game,this is the first game can view source when playing in the world(click "view source"button to view the source)
Open Space A Free Action Game
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Open Space Game


Plays: 2337
Category: Action Games
space attack
Open sports car coloring A Free Customize Game
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Open sports car coloring Game


Plays: 1627
Category: Customize Games
Open sports car coloring Game.
Open the Door A Free Puzzles Game
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Open the Door Game


Plays: 2837
Category: Puzzles Games
solve puzzles to open door and escape the room
Open the Elevator A Free Education Game
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Open the Elevator Game


Plays: 1230
Category: Education Games
Use your brain to complete levels... Can You get to the top level ?
Open the next room A Free Adventure Game
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Open the next room Game


Plays: 1152
Category: Adventure Games
Use your brain to complete levels... Can You get to the last room ?
Open top car coloring A Free Customize Game
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Open top car coloring Game


Plays: 2519
Category: Customize Games
Open top car coloring Game.
Open top jeep coloring A Free Customize Game
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Open top jeep coloring Game


Plays: 1277
Category: Customize Games
Open top jeep coloring Game.
Open-Pit Mining Jigsaw A Free Puzzles Game
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Open-Pit Mining Jigsaw Game


Plays: 3465
Category: Puzzles Games
Open-Pit Mining Jigsaw Puzzle. Can you solve it?
Opening new star showroom A Free Customize Game
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Opening new star showroom Game


Plays: 1122
Category: Customize Games
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Opening Santa
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Opening Santa's Gifts Game


Plays: 2763
Category: Customize Games
It's Christmas Eve and this cute girl just got her present from Santa Claus. She is very happy and can't wait to find out what is inside the gift box. For such a magic moment she has to look really cute, don't you think? Give her a helping hand on getting dressed as pretty as possible for Christmas evening in this cool game for girls! Have fun!

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Tips: For a collection style game that doesn't use any player projectiles you can upload a blank SWF to high the splash screen graphic.