Darwin Project is described as 'In Darwin Project, ten inmates must survive the elements, track each other, fight, craft tools, and use their social skills to be the last one standing'. There are more than 10 games similar to Darwin Project for a variety of platforms, including Android, Windows, Android Tablet, iPhone 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 Apex Legends. Other Darwin Project like games are Oopstacles (Freemium), H1Z1 (Freemium), Ring of Elysium (Free) and Totally Accurate Battlegrounds (Paid).
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.
Oopstacles is “Wipeout meets Mario” – a ragdoll runner for all ages, with quirky avatars and padded obstacles reminiscent of TV shows such as Wipeout, MXC and Slime Cup! – Chuckle at crazy physics-based wipeouts!