Tyran.io is described as 'Free battle royale online game with dinosaurs!' and is a Battle Royale Game in the Games category. There are more than 10 games similar to Tyran.io for a variety of platforms, including Online / Web-based, Android, iPhone, Windows and Playstation. The best alternative is PUBG. It's not free, so if you're looking for a free alternative, you could try Fortnite Battle Royale or surviv.io. Other Tyran.io like games are Vertix Online (Free), Zombs Royale (Freemium), Wings.io (Free) and MooMoo.io (Free).
PLAYERUNKNOWN'S BATTLEGROUNDS aka PUBG is a multiplayer, first-person battle royal shooter set on a massive, 8x8 km island where players must fight to locate weapons and supplies to survive a battle and remain the last man standing.
Fortnite Battle Royale is a 100-player PvP mode in Fortnite: Save The World that is free to play. One giant map. A battle bus. Fortnite building skills and destructible environments combined with intense PvP combat. The last one standing wins.