Ancient portals have been lying dormant, waiting for daring adventurers to travel between worlds. Your task is to lead an expedition through one of these portals, research and build defenses around it, and protect it from hostile guardian life forms.
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No game lists Gem Rifts as one of its co-op favourites yet, so here are the closest matches by Steam tags instead.
Bunker Defense is a tower defense game for 1-4 players. Waves of enemies attack your base, and you must defend it by building different kinds of defenses.
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The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.
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The Final Bastion is a Multiplayer PvP & PvE Tower-defense with a classic Medieval-Fantasy theme. Compete against players in head to head online in a PvP, sending waves against the enemy and growing your economy. Play side by side with your friends in PvE and see who survives the longest.
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Build your ultimate defense with a combination of powerful towers. Attack your opponent with strong Invaders. This game is sure to offer a unique and immersive experience for all tower defense enthusiasts!
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Age of Darkness: Final Stand is a dark fantasy survival RTS where you must illuminate, build and defend humanity’s last bastion against hordes of Nightmares. Set in the remnants of a kingdom consumed by a deadly fog, you decide. Will you hide in the light? Or take back your world.
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Escape from the enemies and build a fortress to face them, you can play alone or in online games of up to 4 players.
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An open-ended factory management game with RTS and tower defense elements.
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A tower defense game supporting up to 4 players online, with various equipment to boost your power.
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Crumbled World is a tower defense game where you're tasked to create a maze of defensive structures with the purpose to defend the world crystal. The world crystal is what keeps the world from further collapsing into darkness and without it no hope exists. Your missions is to defend different areas using knowledge and abilities gathered to adapt to new challenges.
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Play solo or in co-op with friends, take control of the hive and protect it from enemies. Build factories and defence, research technologies and, if necessary, use nuclear weapons, but do not let the enemies harm the queen!
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