First BR game I recall playing was actually a shareware single player Amiga text game named LabyrinthII by Russell Wallace. It was on Fred Fish Disk 162. So a

First BR game I recall playing was actually a shareware single player Amiga text game named LabyrinthII by Russell Wallace. It was on Fred Fish Disk 162. So a classic text adventure style interface and map, but you and the bots all started at random locations and have to go around searching for weapons & armour and trying to survive against each other to be the last one standing. Didn't have the concept of a shrinking playzone but was absolutely a Battle Royale. Really enjoyed that one back in the day, and would often play while listening to the 'Unknown Girl' mod that was on the same disk. The Amiga had proper pre-emptive multitasking after all :-)