Sea Survival offers an open-ended, sandbox experience set in a vast ocean with no human civilization around, just abundant wildlife. Players must start by building a raft to navigate the waters, gathering essential resources like wood, food, and tools. Fishing and cooking play crucial roles in maintaining health and stamina. Exploration of mysterious islands scattered across the sea provides opportunities for discovery and survival. The main goal is to extend your survival time by overcoming numerous challenges and obstacles. Utilize a grappling hook to retrieve valuable items such as chests, boards, and other useful resources floating nearby. Upgrade your raft, construct a workbench for crafting, create a cozy bed for rest, and fashion a bowler hat for some style. As you progress, unlock new items that enhance your survival skills. The game includes a realistic day and night cycle, requiring players to carefully manage their activities to stay safe and well-prepared throughout each period.