Games starting with O

Oasis

Oasis Take care of exotic animals, grow fruits and vegetables in a deserted island in the planet of Oasis! 10 rate

Oblivia: The Lost City

Oblivia: The Lost City Welcome to a dark city where your memories are stolen and as an agent, you must uncover why. 7 rate

Old School Runescape

Old School Runescape Take a stroll down memory lane with this timeless MMORPG, Old School Runescape! 10 rate

Omega Zodiac

Omega Zodiac Ragnarok is coming to the world and as a guardian of Athena you are tasked with stepping in the way of the coming storm and trying to save your home. 6 rate

Once Upon A Night

Once Upon A Night Survive and thrive in a dark and mysterious forest in this unique building game, Once Upon A Night! 9.5 rate

One Piece 2: Pirate King

One Piece 2: Pirate King Join Luffy and the gang of honorable pirates in a brand new adventure against the relentless marines and bounty hunters in One Piece 2: Pirate King! 8 rate

One Piece H5

One Piece H5 Recruit your favorite characters from the One Piece universe and battle your way to the top in this fun casual RPG, One Piece H5! 10 rate

One Piece Online

One Piece Online Have fun questing and fighting side by side with Luffy and other familiar faces from the One Piece universe in One Piece Online! 7 rate

One Piece TD

One Piece TD If tower defense and One Piece are your specialty, then you mustn’t miss out on this exciting, challenging and brilliant game, One Piece TD! 9 rate

One Piece: Legends of Pirates

One Piece: Legends of Pirates Set off on an exciting journey across the seas with Luffy and his friends in this brilliant One Piece Online remake! 8 rate

One Tower

One Tower Fight to destroy your opponent's tower by overwhelming him/her with your customized waves of minions. 8 rate

Onigiri

Onigiri Enter a world filled with Japanese Mythology and beautiful samurai ladies that battle out against evil beings in Onigiri! 9 rate

Onrush

Onrush Rampage around the racetrack in Onrush and takedown opponents in a unique racing experience. 10 rate

Open Sewer

Open Sewer Open Sewer is an RPG/simulation game where you get to manage your apartment block, recycle bottles for cash, craft a variety of goods to sell and use, and explore a gritty and dark city. 9 rate

Orcs Must Die: Unchained

Orcs Must Die: Unchained Enjoy a unique blend of tower defense and MOBA in this amazingly competitive and fun game, Orcs Must Die: Unchained! 9 rate

Featured Games

Second Life Second Life Build your own perfect place in the biggest virtual world around. Forge of Empires Forge of Empires Starting with a small Stone Age settlement it is your task to create an empire and follow it onward throughout the centuries! Sinespace Sinespace Explore tons of gorgeous, player-created worlds or create your own in Sinespace! Roblox Roblox Create your Own Game or Play Others Creations in A Fantastic Sandbox World. Lady Popular Lady Popular Dress to impress in a stunning virtual fashion game where you can own the catwalk. Tribal Wars 2 Tribal Wars 2 Rally your armies, fortify your castle walls and lead your soldiers to glory in Tribal Wars 2 today!

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