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Reef Defense is a fast-paced, intense strategy game where relentless waves of crustaceans are coming for your precious eggs! Arm your reef with strategically positioned defenses and hold the line. Can you outlast the swarm, or will your eggs become crab food?
PC (Microsoft Windows) · Jun 19, 2025
Worldwide · Exact date · Full release · IGDB
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42 achievements available.
Complete all 8 levels of Atlantis
LockedSteam
Blast 5 cannons on Pirate Isle
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Complete all 8 levels of Coconut Island
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Collect 2 cowries, 2 periwinkles and a scallop shell
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Collect 5 corals in game and place them in your reef
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Find 5 jewels stolen from Her Majesty by pirates
LockedSteam
Crush, smash and chomp 1000 crab and shrimp
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Crush, smash and chomp 10,000 crab and shrimp
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Crush, smash and chomp 25,000 crab and shrimp
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Crush, smash and chomp 500 crab and shrimp
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Crush, smash and chomp 5,000 crab and shrimp
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Crush, smash and chomp 50,000 crab and shrimp
LockedSteam
Populate your reef with fish, corals, crabs and sponges to attract dolphins
LockedSteam
5 Moray Eels found in the scene
LockedSteam
Feed and grow 5 fish to full size
LockedSteam
Collect 5 fish in the game and place them in your reef to unlock the Lagoon Trigger
LockedSteam
Find the pirate flag and place it on the sunken pirate ship Adventure
LockedSteam
5 Wartskin Anglers found in the scene
LockedSteam
Populate the reef to help the Azure Damsel to hatch
LockedSteam
Populate the reef to help the Blue Fin Damsel to hatch
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Populate the reef to help the Fairy Basslet to hatch
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Populate the reef to help the Three Stripe Damsel to hatch
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Populate the reef to help the Longfin Damsel to hatch
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Populate the reef to help the Neon Damsel to hatch
LockedSteam
Populate the reef to help the Powder Blue Damsel to hatch
LockedSteam
5 Marbles found in the reef
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Name 5 fish in the reef
LockedSteam
Complete all 8 levels of Pirates Cove
LockedSteam
Find the cutlass, pirate flag, ship's wheel, old key and treasure map
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Collect 10 golden sea stars to redeem for 100 gold coins. There are 3 on each level.
LockedSteam
Collect 10 purple sea stars to redeem for 100 gold coins.
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Collect 10 blue sea stars to redeem for 100 gold coins.
LockedSteam
Collect 10 Mosaic sea stars to redeem for 100 gold coins.
LockedSteam
Collect 10 Cushion sea stars to redeem for 100 gold coins.
LockedSteam
Collect 30 sea stars in the game
LockedSteam
Collect all 5 ship's in a bottle to unlock pirate's gold
LockedSteam
Collect 5 Atlantis Crystals
LockedSteam
Collect 5 Island Tikis
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Open the pirate's treasure chest with the old key
LockedSteam
Find 5 amulets in the game
LockedSteam
Complete all 8 levels of Turtle Beach
LockedSteam
Complete all 8 levels of Volcano Isle
LockedSteam
Community notes
