Free Battle Royale io games like surviv.io and zombsroyale.io. A battle royale style game is like a contest in which the players start out on random places on the map. The players need to look for weapons and equipment, and run away from the storm while simultaneously fighting each other to survive. Battle Royale games are winner-takes-all. If you survive the storm and all the other players - against all odds - you win the game! 

The very first Battle Royale game was PUBG. Fortnite made the genre even more popular and is considered the most popular Battle Royale game. The genre eventually made its way to the io game space with games like surviv and Build Royale.