Green Man Gaming has Playerunknown's Battlegrounds [greenmangaming.com]
on sale for $21.89 after using voucher code. (Reg. $29.99)
Edit: It looks like the codes are 1 time use so if you have a GMG account, you should get an email with your own code. Mine went to my junk folder so be sure to check there too.
This game is still early access but VERY popular right now.