Scavenge for resources Scavenge for resources to build upgrades and expand your SeaFortress. Create SeaFortress Create and modify your own SeaFortress. Craft defense, harpoons, pikes and bows. Customize SeaFortressIdentify yourself with your flag and badge. Customize their appearance to make your SeaFortresss look unique. Features of the game. * Unique world of survival, construction of Sea Fortresses. underwater creatures and giant sea monsters* Ability to create, customize and improve your city.* Invade other players fortress and fight with him, plundering his stash of resources.* Large open world.* Difficult and terrible monsters from the depths.* Crafting, building a base, collecting resources.