Equipped with nothing but water balloons, you must help a young child named Leek on an uber-challenging journey home!
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No game lists Adventure of Leek as one of its co-op favourites yet, so here are the closest matches by Steam tags instead.
Critter Climb is an online 2D platformer where you and your friends climb through unique biomes with dangerous hazards. There’s only one way to go... UP! Give your friends a little kick on the adventure.
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Play with up to 4 players in a game of Moonball! A 2d platformer sport game involving skill and sometimes a bit of luck ;) Score on the opposing team by knocking the ball into their goal! Pick up weapons and wacky power-ups to give your team and advantage...or disadvantage.
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Trees Adventure is a 2D side-view platformer where in single player you control two characters at once, and in online or local co-op each player controls their own character
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You are a brave sheep who was sent to space by the USSR to test a new spaceship, but it veered off course and crashed on an alien planet! You must travel across strange worlds and fend off enemies to make it back to Earth safely.
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Two balls of wool, one thread, one big adventure! Jump, swing and puzzle your way together through more than 50 interwoven levels — in co-op or multiplayer.
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Grab your best bud for help in this new co-op challenge to help two adorable penguins, Bread and Fred, reach the top of the snowy summit. Time your jumps, cling to walls and swing across gaps to see how far you can make it before you tumble all the way back down the mountain.
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Shoot and slash your way through Enemies and Levels while upgrading, in Endless Mode and the Campaign in this fast-paced Hack 'n' Slash. You can even face these challenging levels while playing up to 64 players online!
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Work together to complete one million levels, one player at a time. Continue where the previous left off. Chat with others while you wait for your turn. How long will it take?
A fast-paced arcade platformer where platforms vanish behind you. Collect coins, upgrade your runner, and customize your character with your own 32x32 sprites. Three difficulties. Multiple game modes. How far can you run?
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Jump, shoot, and slash your way through 30XX, the roguelike action platformer you can play with a friend! Explore lush, ever-changing worlds that mix precise platforming with fevered combat. Destroy fearsome Guardians. Master unique Powers. Rediscover the thousand years we've lost.
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