EvoWorld.io, previously known as FlyOrDie.io, is an evolution-based, survival game with multiplayer IO battle-arena elements. It tasks a player to evolve an animal into the strongest possible creature in the world after surviving attacks from other players across a wide variety of natural and manmade environments. The player must evolve their animal through eight evolutionary stages and 45 animal types.
The player must direct their animal to fly above and away from other players' animals and any threats that display red borders. They must direct it to eat items with green borders and drink water to evolve to the next stage. Each animal type has special skills that the player can use to survive. If they earn gemstones and have an account that they set up directly or via Google or Facebook login, they can also buy skins, effects and pets, additional gems and even set up a premium account with added benefits. If they watch an advertisement, they gain more experience points.
EvoWorld.io doesn't merely present the player with animals found in nature. There are mythic creatures, cosmic beings, demonic beasts and even undead nightmares. The player's ultimate goal is to evolve into a grim reaper.