Battle Royale Tycoon

The next game to take advantage of the Battle Royale craze that's ongoing, isn't a straightforward battle boyale, instead, it merges that with a whole other genre - that of the tycoon game. Battle Royale Tycoon has you building your own arenas, and managing the battle royale experience for guests who are seeking it.

Here's a bit from the steam store page about it:

Design and build your own arenas for your guests to fight. Set up the Arena rules and Game Mode: Battle Royale, Team Deathmatch, Capture the Flag. Listen to your guests and improve the design of your arenas: Add guns, cover, fix spawn kills. Build up the rest of your park with Shops, Bathrooms, Shooting Ranges, etc. Repair your items and keep them in good condition so no one gets hurt. Clean up the arenas before starting a new battle.