https://www.pcgamer.com/pubgs-first-limited-time-event-mode-is-live-and-focussed-on-flares/

Flares have been added to PlayerUnknown's Battleground? Nice! The game definitely needs better clothes. Not sure how I feel about bell-bottomed breeches, mind you, but I guess beggars can't be choosers.  

Ah, flare guns. I see.