Relay Protocol is a logic-based puzzle game built around experimentation, spatial reasoning, and energy-based mechanics. Redirect lasers, manipulate energy signals, and use specialized characters to solve interconnected test chambers inside a mysterious industrial facility.
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No game lists Relay Protocol as one of its co-op favourites yet, so here are the closest matches by Steam tags instead.
Puzzle Parasite is a sci-fi puzzle adventure where you wield telekinetic powers and a cricket bat. You send energy cores flying, power alien tech, and avoid deadly lasers, as you go deeper to uncover the hidden secrets. A handcrafted tribute to the classics that made us think in new ways.
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Kwark is a single player game about a creature that has to go through levels and then something impossible happens at the end! The game can be both from 1 person and from 3!
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A generation ship with an unclear objective, housing an expendable crew tasked with waking up passengers to complete the mission... No One Left To Die is a short, sci-fi, action-puzzle-platformer that can be completed solo or with up to 8 friends in a nuanced cooperative and competitive environment.
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Eye x Eye is a two player cooperative platform. Push and pull your friend while trying to overcome challenges and the urge to throw them off a cliff.
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Work together with a partner to solve a series of non-Euclidean Escape Room puzzles to uncover the mystery behind the vanished crew of Outpost Rhea, a deep-space research facility experiencing strange spatial anomalies.
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Once Before Us is a cooperative puzzle adventure for two players - 10 chapters, 8-10 hours of co-op play. Communication and observation are the only ways forward: every riddle, mechanism, and clue requires teamwork. Together you'll explore forgotten places and uncover what came before.
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A two-player online co-op puzzle climb where each of you sees a different truth on your own screen. Talk through the safe tiles, the right colours, and the real path, scale twenty floors of a hostile corporate Spire, and trust what you hear. Your voice is the controller.
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Explore a strange village filled with Italian Brainrot characters. Complete absurd quests, find and trade items, and unlock different ways to escape. Play alone or with a friend — and try to make it out alive.
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Combining shooting with puzzles create unexpected result, which is fun(Sometimes). Play it with your friend!.
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Root of Win is a 3D puzzle game where you solve levels with a friend in a co-op or alone.
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